So in summary, you're mad that casual players can get very good loot (doesn't affect you at all). I think you have underlying issues that you need to get help for, because you care too much about what other players are able to getBlockade had so many bugs the early killers skipped half the mechanics through "creative use of game mechanics", some of that was patched later, but the milk was already spilt, and they couldn't make the boss much harder as that would screw the guilds that didn't rush it and made it unfair for the early race (even past the first 2 guilds).
What I find the worst with tuning is you join an average heroic pug and it will probably disband at conclave, best case scenario at merkatorque. Then you have 1st mythic boss that is piss easy, even easier than taloc, so you have plenty of "mythic" raiders that did something like 1/9 mythic 5-6 heroic etc. Complete joke. Having early mythic bosses easier than late heroic bosses is a tuning disaster imo, but something that constantly happens, Uldir and Tomb of Sargeras were similar cases. There should be clear progression path - "we've finished heroic, now we're ready to step into mythic" and not "lolol mythic is so ez" because they put some loot pinata boss there, especially one that drops top ilvl weapon for 2h str and amazing healer trinket - these items should belong to loot tables of challenging bosses, not loot pinatas.
I do enjoy not having stupid "gatekeeper" bosses in the middle of mythic, like for example situation in HFC in WOD where you had Gorefiend being much harder than 2-3 bosses after him, the difficulty increase should be steadily up and not all over the place. I also enjoy the fact they didn't pile bazillion frustrating bosses one after another like in Tomb, where mistress, maiden, fallen avatar and ultimately KJ proved to be a guild killer, as half the raid bosses were annoying and frustrating in a raid tier that landed over the summer.
So yes, having early mythic bosses not gruesomely hard is a good idea, on the other hand it feels like the first boss is way too easy and several bosses like jadefire and blockade are way too "cheesable". Lack of quality testing and rush to release the patch shows again. Tbh same issue with Jaina, the "intended" way to do the boss is so bad nearly everyone uses Method's "cheese and rush" strat instead. Who the heck tests these encounters.