who cares about world first ?of course the game will not balanced for that tiny portion of players and niche meta-gaming. Players trying to be the quickest will use whatever exploit or mechanics to maximise, but it's not the normal game neither it's a mandate for everyone how to enjoy the game.
For everyone complaining about shadowpriests, they're rare for a reason and the community are mostly responsible for their low numbers but I hope everyone here complaining are working on Mythic Uu'nat because if its lower difficulty you certainly dont NEED that meta.