There’s no proof that the game is bombing. Do you honestly think this forum is representative of the community as a whole? Please. WOW’s forums have been a cesspool of negativity since day one, and that was the most successful MMO in history. Go to POE and peek around or another other game that gets propped up by others here. Forums are NEVER a good indication of how well a game is doing because they always attract trolls and negative people. The only people that have the real data is Blizzard.
And I wouldn’t worry about future development because Blizzard released seasons and expansions for D3 despite all that game’s troubles. They also continued expansions and support for WOW despite player numbers dwindling and being overtaken by FF14.