Blizzard operates completely independently from Activision.
The cash shop was a thing before Activision had even entered into the equation(you could argue it goes even further back if you consider people buying up hundreds of TCG packs hoping to get the spectral mount as a real money mount) and it was Vivendi Games(who unlike Activision actually DID own Blizzard, long before WoW was released) that implemented it.
The decision to release Warcraft III Reforged in an unfinished state because they had already accepted preorders and promised a release date was entirely the decision of Blizzard, as was the decision to outsource the art assets to Lemon Sky Studios.
This idea that Blizzard is some infallible company and everything bad that has happened in the last 13 years is somehow Activision's fault is ridiculous. Even Kotick has largely left Blizzard alone in his position as CEO of Activision-Blizzard, because his main goal in merging was to piggyback on Blizzard's success in the Chinese market to sell Activision games there.