A bit LTTP, but I've been playing through this with the boy and thought I'd post some thoughts.
-Ad hoc is def more fun than solo; by myself I usually end up taking the more difficult levels by attrition and tactics - which is rewarding, but there's something great about just bowling in and wasting some bugs with a friend.
-Palewing, holy crap. Both great and really kinda limited. It's hard to go back to ground trooper but I really find myself limping without my go-to rocket launchers.
-Anyone figured out what the hell the Pandora is good for? Does it actually do its damage visibly?? A scan around the internet suggests that it's really useless.