I've been having a lot of fun with Pit in the JP version, though i seem to be the only one, locally.
Pit's Fair has really low landing lag. I've been able to reliable go into a grab if i let the last hit of it hit on shield, then immediately land and grab. Alternatively, if i get someone with a short-hopped fair and land before the last hit of it, i can grab from that, too.
Pit's throws are pretty good. Uthrow to uair is good for forcing air dodges. And Dthrow combos into fair pretty nicely. Lots of fun there.
Upperdash arm is great! Very nice power for a move with superarmor. If you Jump before you do it, it makes it safer on shield, though characters like ROB can punish it with an upsmash out of their shield. Still, it bounces you up, better than the grounded option just leaving you standing there. Oh, and it doesn't put you into freefall, but it DOES have massive ending lag...
I managed to do something weird that i've been trying to replicate, where i hit someone with the aerial version of upperdash arm and right after hitting them, pit landed, having much less lag than if he'd done the normal animation of popping up with the hit. This could be a pretty cool thing if i can find a way to do it consistently. I'll name it the Nyani Cancel
Or just, you know, land-canceling the upperdash arm.