Diablo Immortal and Warcraft III Reforged, as well as the mismanagement of the Overwatch competitive leagues and the disaster of Heroes of the Storm have all done more to hurt Blizzard’s brand image and stock portfolio than any World of Warcraft development decision. In fact, Classic was a pretty resounding success (not much spent in development, and tons of resubs for it), WoW is one of the golden-children of the portfolio right now.
I also suspect you don’t really know who Ion is and what he has accomplished in this game. Did you play Vanilla? Were you in the world-first race for pre-nerf C’thun? Did you lead a top-3 world progression guild?