Loud critics make up a tiny percentage of the player base. You have no idea what the numbers are and won't until blizz releases them.
Still, historically we know that bid drama does not correlate to mass drop in sub numbers. Hell, GC just posted something about that a week or two ago[1].
>Dropping a game because of a specific design change (despite what you might read on forums / Reddit) is actually pretty rare. I know it happens, but if you’re stack ranking the reasons why people quit, those specific responses end up being so far down the list that it is hard for a development team to take actionable feedback.
WoW remains massively successful as far as I'm aware.
[1]: https://askghostcrawler.tumblr.com/post/157080214673/unsubbi...