That is the logical outcome of your interpretation, that there are no barriers to what can be placed onto available races. This is the basis for your high elf skins on Void Elf request after all. Dark Iron Dwarf skins and Mag'har Orc skins are conspicuously absent from the customisation options being given to Dwarves and Orcs respectively.
You attempt to draw a distinction between why those skins aren't available and the Void Elves because the aesthetic you desire on the Void Elves happens to be on the other faction, whereas the Dark Iron Dwarf and Mag'har Orc skins are on the same faction as their parent races. Which is of course a terrible distinction, given the entire reason Void Elves exist as they do was to differentiate them from Blood Elves. It's akin to saying the forty metre tall and forty metre thick wall in front of you is actually a motorway to your destination.
And it is worth pointing out that none of the options presented to Moorgard violated canon. That none did is not the point. What matters is that he was specifically asked. Whilst they are clearly prepared to facilitate a great degree of player latitude in how they headcanon their character, some things ARE beyond the pale. Such as pretending your ordinary Orc is Mag'har or that your Dwarf is Dark Iron. If lore wasn't a consideration, he wouldn't have been asked. Nothing that has been added so far violates lore. And nothing was offered that could have violated lore.
What he says was correct. Where you fall down is that you expect everyone else to take that decision seriously. He is not saying they support your choices. He is saying they don't care, you do you. BUT he is also saying in that in relation to the changes he approved, which form the context of the question. The Wildhammer Dwarf skins, the Forest Troll skins etc.
For the most part, these changes are inoffensive. Who would object to a Dwarf declaring they are wildhammer or a Troll declaring they are descended from or related to the Sandfury? Nobody. These examples don't violate the overall lore.
But some things do violate lore and would not be accepted. Which of course brings us to the specific case vexing you, your desire to be a Void Elf who can pretend to be a high elf. That is not something that can be accepted because a Void Elf is, by nature, a transformed high elf. It would be akin to a lightforged draenei arguing they aren't lightforged, or a Nightborne arguing they are in fact a pure Night Elf.
Now, if players are insistent on roleplaying that, then what Danuser said is correct. It's entirely up to you how you rationalise away everything about your avatar that will continually remind you that your chosen fantasy is actually inconsistent with what you've selected in a way that Dwarf and Trolls fans won't have to engage with. But any Void Elf player who attempts to argue that they aren't a high elf will be stretching things too far to be taken seriously beyond themselves and those who chose to humour them.
And that is where that reality exists, in the player's head. Where the game agrees, that fantasy can now be expressed within the game. But if you choose a story for your character at odds with what your avatar is well, that's up to the individual to suffer through it.
And let's be honest, it's your particular idea that is driving this particular debate. They made Void Elves different for a reason. And just because some Void Elf players still hanker for the ability to look like a Blood Elf you somehow expect the rationale that led to the creation of the Void Elves in the first place to be ignored.
Even were they to facilitate your request exactly with something that isn't a monkey-paw and provide you with an option that left you indistinguishable from a blood elf, you would still be playing a Void Elf. What is the next step then? New racials that aren't Void themed? New emotes that don't remind you that you are a Void Elf? No reverb on the emotes because that is a by-product of the void? The 'need' for a Void Elf Paladin despite the fact that such a race-class combination is a contradiction?
Frank bias? Only one of us has engaged in a serial disconnect with reality over the years. Need I remind you that your reaction to the Void Elf announcement in 2017 was to argue, without a hint of doubt, that the reason Ion said 'Blood Elves are High Elves' next to Jesse Cox was because they didn't want to rain on the Void Elves big reveal day and that high elves would clearly come later. You kept that particular line going for months as I recall because the simpler truth was too much to handle.
Historically you have done everything possible to avoid the truth. They considered high elves as an allied race. They determined high elves and Blood Elves were identical. They created Void Elves as a compromise to give the Alliance a thalassian elf model without giving them a duplicate of a core horde race. And they consider giving them a duplicate of a core horde race a devaluation of the factions they went out of their way to assert the importance of at the last Blizzcon.
Increased customisations are not a license to junk everything that went before. They are not a blank page. This is not a year zero. It is possible to offer advanced customisations to existing races without junking the rationale that led to the creation of Void Elves. It is possible to expand Void Elf customisations without turning them into ersatz high elves. As for your points.
1.) Beta isn't finished yet, but how blue eyes are depicted is currently wildly inconsistent and it would be beneficial if things were standardised. If not, that the blue eyes on some exiles in older content isn't up to the same level as the blue eyes Blood Elves are potentially getting is irrelevant. What are you going to argue, that high elves are different from blood elves because blood elf blue eyes are a slightly different shade than the eye colour used by some exiles? You aren't scraping the barrel there, you have scraped through the barrel, through the foundation of the building the barrel was in, down through layers of soil and are approaching bedrock. If Blood Elves get blue eyes, then that's it for the eye colour argument. It's gone.
2/5.) The same point and as Blizzard has shown they aren't willing to cross some lines just because the player base wants them to. If they were ever going to give the Alliance High Elves, it was going to be as an Allied race and it was going to be instead of Void Elves. Void Elves are as big a barrier to the exiles being an allied race as Blood Elves are after all. And if 99% of Void Elf players (absolute hyperbole) want that badly to look like a high elf, the Horde is waiting for them as Ion said.
3.) Danuser said you do you, not you do you and if people point out you aren't what you say you are in game please open a ticket to report them.
He also said none of the options presented to him violated canon, so you doing you with these options isn't an issue because it is perfectly consistent with the game world. Nobody is arguing over what Danuser said, we are arguing over our interpretations, because you seemingly believe what he said means there are no limits whereas the fact he was asked to judge whether certain selections could violate canon implies there are certain options they won't give for being beyond the pale.
4.) No, the most feasible way as an Allied race before Void Elves existed. High Elf like skins on a Void Elf won't be a high elf, it will be a Void Elf. The racials for Trolls are Dwarves are agnostic, they are race wide. Void Elf racials establish you as a Void Elf, no matter how you look.
6.) Ion said high elves were possible as a sub-race when asked in 2013...and then he sat down and thought about. Afrasiabi said it was merely possible, then segued into a commentary on the dumpster fire of a debate it is on the general forums. Possible is not a promise. Possible is not even probable. Possible is possible. And what you end up getting may not be what you wanted.