Not trying to defend them, and I haven’t looked at the feature set of the new Discord integration, but I can imagine a reason for most of those - assuming, of course, that you can basically chat in through WoW on discord.

Afaik it links channels, but to know if your profile is in the server the channel is on, or join you there, it would need to manage and read servers, no? Of course, there are probably better ways how to do that, that respect your privacy a little bit more.

The friendlist I’m having a hard time justifying, can you send DMs from WoW?

But I do honestly wonder how would a MVP permission set looked like if you tried implementing the same integration they are doing, whatever it is.

But yeah, Microslop hoarding data is probably the reason for most of those.