I got a patch a few days ago. I think it has improved things. I had a six man tag yesterday and it wasn't unpayable. Intros are still crap, ai is still pretty bad, and commentary is a little less messed up.
I have to try to lose on purpose with this AI.
Japan Switch Sales comparison vs 3ds and Wii u: http://gamrconnect.vgchartz.com/thread.php?id=226216&page=1