I had been a WoW subscriber for over a decade. WoW's quality has been in decline (IMO) recently in BFA, and I stayed because I still occasionally enjoyed it, but it no longer has the same magic that I remember. WoW Classic brought back some of that nostalgia, but it was short lived for me.
BlizzCon last year made it pretty clear that Blizzard has shifted their focus [0]. There is no way they were delusional enough to expect a happy reaction to the Diablo Immortal announcement. It's very clearly targeted at the Chinese market.
Their actions in the past month (and year) are very telling - they are no longer the company I used to admire. I've canceled my WoW subscription as of last week, and I've deleted all of their games from my devices. I know that my actions alone/individually don't really have an impact on them, but I can't go on supporting them after the things they've been doing recently. Bellular has a pretty good video breaking down some of this situation as well [1].
It'll be interesting to see how BlizzCon goes this year.
[0]: https://www.reddit.com/r/videos/comments/9tsy49/blizzard_get...