Super fun to see the crews united (without Harold and Reid who get to chill and eat ice cream haha). I liked a lot of things about this! Some cool combat stuff going on, action sequences, interactions between different character abilities. I did find combat a bit slow feeling with a lot of enemies, and the bosses were super tough with quite brutal gimmicks. There were some nice funny scenes as well. I do need to see those final post credits things.
Oh! And edited Oldhar faceset! That was great! The one lost opportunity is using Low's sick Oldhar battler! That would have been a sweet inclusion. We don't get to see enough of that guy.
EDIT: I played through all the final scenes and they were pretty funny! But why'd you make me do that boss battle three times! Would have been a totally decent ending to get those three scenes in there for fun, and there's no good reason to make us repeat the boss I think. Bumping comedy score though!