I feel like playing a couple 2v2s, so just let me know if anybody else wants to play.
On the topic of Pac-Man's viability, it isn't that he doesn't have any good combos at high %s, but that even at low percentages he has few guaranteed strings (fair>something, I guess), which many other characters do have for racking up some damage with relatively few risks taken. Of course you can do some nasty follow-ups if you can get some good reads on your opponents (I have done so several times myself), but Pac has to work more on his punishes to be succesful compared to the characters i nteh upper tiers. He's nowhere near low tier, though, that's for sure.
Trampoline is fun, but you can't ever compare the grab>combo follow-ups that Diddy, Sheik, ZSS, Luigi, Mario, Roy, Charizard and several other characters get, with some of them getting good enough follow-ups that they can actually do their KO moves from a grab. Comparing a move that can lead to KOs with a 7% damage move with pitiful knockback is a bit of a stretch at the very least. I won't deny that his nair's decent knockback and lightning-fast start-up are a godsend for escaping some attacks, though.