In every thread where someone suggest something for WoW there are now always some naysaysers: "just play FFXIV/ESO/Whatever" because yes, a lot of people hope that blizzard copies something from there that works and makes it better.
Dear Folks, don't forget how WoW started: WoW was NEVER an MMO that was groundbreaking, fresh and had completely new ideas. What WoW always was back then when mmos were still a thing was that they took the good stuff from other mmos, used it and made it better. But then there was no other mainstream mmo out there and blizzard began to stagnate. Later ESO and FFXIV came out, but eso was never the big success and had it's own playerbase, and FFXIV 1.0 was probably the biggest flop SquareEnix ever created; such a flop that they needed to stomp it down and re-release it. But even then it was ok, but not the big success. And even if upcoming expansions were better, it was still not the big thing.
But then covid hit everyone hard, and wow couldn't provide content anymore. Home Office is with a game like WoW not as easy as they tried to make us believe it is, and the whole development was frozen. Now FFXIV has content for all the players of WoW that are starving for it (and they managed to still release new stuff too) and it is natural that players want to play WoW, but simply can't, because there is no content for them and because WoW has still many big issues that needs to be fixed.
That said it is not that FFXIV was only successful because of covid, they actually did a lot of thing right, something that wow was doing before too. Not invalidating old content, a good storytelling (telling the story in the game rather than in a book), content for solo player, player housing, a huge crafting system and so on, and if blizzard went on as they did they would take over WoW, even if the combat system in FFXIV is horrible.
So nope, just because someone wants to improve WoW maybe with ideas from final fantasy 14, ESO does not mean that they should "just play FFXIV/ESO/Whatever". Especially when the success of WoW was always to improve the ideas from other games (or to be direct: steal it). Just let us play WoW.