On one hand, it could be useful with the likes of WoW to have a better chat app with guild servers and rooms. I think many players are already there. Blizz adapts to what is still hot.

But on the other, one’s personal discord account can hold a bit more value than an addon to BattleNet, it may have it’s secrets, even in the list of servers you joined, and it probably have friends not interested in that at all. I’d probably create a new acc if I need one for that purpose.

I am surprised Discord didn’t do something to sandbox Blizzard’s integration. Like creating a user who have access to these and those servers with these permissions. Probably they didn’t thought about that, but it could’ve made integrations more safe and viable.