Alright, I'd like to update this a bit. I'll try to be as straightforward as humanly possible with you guys about the situation.
Grimchan generally has a policy to be friendly with everyone. We're just a comfy little corner of the internet, not meant for drama. Even after asking everyone I can and going over the linked thread I have no intention of taking sides.
Now, that means no bias to either parties. So I did remove the link and left the discord. I have no bad blood with any members of the ACA, but also don't want to delve into the dumb /cow/ crap. We are staying 100% neutral.
Anyway, I made a personal promise in response to this that Grimchan will not join any sort of formal imageboard coalitions from now on, simply out of the fact they attract drama (warranted or otherwise).
So there. Hopefully that answers everything. If not I'll happily answer whatever anyone's wondering about.