First problem I encountered was that there is no gameside friendlist, which leaves me unable to add my friend playing on Steam for coop.
After half an hour alter we had figured out how to get into the same game instance through the obscure social menu, but I couldnt believe we did it correctly, since we had to use a goddamn code to find each other and got kicked every five seconds for: fighting each other, dying, leaving the area... EVERYTHING is trying to end your coop session in this game!!

Is THIS how it's intended to work?? Unbelievable!