I never said "I didn't win a major conflict. I was talking about the general perception of players regarding the Alliance in WoW vs WC2/3. Maybe try to actually read and understand what people mean before falsely accusing them of saying things they never said.
As for SoO that was a combined effort by Horde and Alliance which was very clear from the quest where Alliance players had to ask/beg Vol'jin if they could join the Darkspear Rebellion.
Most people that play WoW (and Warcraft 2 and 3 before) base their perception on what they see in the game. They don't read the books or wowpedia.
What was visible in MoP for players was a crater where Theramore used to be. What was not visible for players was a destroyed Oggrimar after SoO. These kind of things color people's perceptions/memories a lot more than someone from Blizzard telling Alliance players that SoO is a great "fist-pumping" moment for them since that is not their memory of SoO.
I guess it was terrible for Horde players to have to walk everywhere on foot because flight-paths didn't work and their mounts had starved from lack of food
I never said High Elves would fix any issues.
It should be clear to anyone who follows the "discussions" here and on the official forums that the request for playable High Elves is mostly driven by nostalgic feeling towards High Elves in WC2/3 (and LOTR/Tolkien), not lore/facts.
Part of that nostalgia stems from the fact that in the RTS games the player always won (eventually). Since there were High Elven units in both WC2 and 3 on the Alliance side people have a more positive connotation with them than with Humans, Dwarves, Gnomes and Night-Elves who have all changed compared to WC2&3.
The lore/historical accuracy of their (childhood) memories of WC2/3 is not really important to them but you are right that playable High Elves wouldn't change anything because the romantic feeling towards them would very quickly be lost once people realize it doesn't really change their game experience.
Pandaren are a good example/warning. They were one of the most requested playable race for years and Blizzard didn't dare give them to a single faction but currently they seem to be one of the least played races per faction.