Doomsayer during WoD beta: WoD will suck and people will quit!
Fanboys: no they won't fuck off with your opinion.
People quit.
Doomsayer during Legion beta: legiondaries sucks and people will be outraged!
Fanboys: no they won't fuck off with your opinion.
People become outraged and Blizzard has to change legiondaries.
Doomsayer during BfA beta: BfA will suck and people will quit!
Fanboys: no they won't fuck off with your opinion.
...see where this is going?
Mythic raiders and M+ players don't have anything to worry about, those are up to par like always. PvP is still dogshit but it has been dogshit for years so no changes there. The problems are completely unnecessary changes (WQGF getting nuked, GCD, pruning) and the lore dumpster fire we're seeing. The best parts of BfA's story have nothing to do with the faction conflict at all (G'huun and the Drust). Unfortunately 8.0 ends with all of those threats resolved and the focus shifting towards the faction conflict. And everything we have seen about the faction conflict so far has been complete dogshit.
The worst thing that can happen is if Azshara and N'Zoth get offed in 8.2 and 8.3 respectively and the faction conflict robs us of a story that Blizzard has been building up to since 4.0. Did you know that the Thunder King was originally intended to be the main villain of MoP? Yep, that got scrapped in favor of a crappy faction war story. And now we're heading in the same direction again.