ok, too late to remark on the fact that save for a little hitstun, the dair really sucks and is only good if the opponent is at 200% and falling directly in your range off the edge. Since you have a semi-intelligent discussion going, I'll let it go without mentioning that the time you're putting in this could better be put into any possible move links that can be put in for mindgames or finding some positive ways to explain Roy's current tier position to newcomers.
To address an old topic, it is true, Roy does has the worst recovery in the game. there was even once a recovery tier list, and Roy was bottom (still trying to recover it though (*irony*)). see, ganon falls slowly and is heavy, so his is good. the things that makes C. Falcon above roy are simple (and mind you this also applies for ganon):
1) He's heavy
2) His up-B is a pain in the *** to edgeguard since it grabs you (and to my knowledge has only moderate lag).
3) there's a glitch that good players abuse at the right times. See, in the air, if you do the down-B, you get an extra double jump, which sounds dumb, but when you're higher up in the air, this will save you.
luigi's recovery is beast, no contest.
1) he falls super slow
2) his side B goes really far at full charge, and he can charge it all the way if needed due to his super slow fall (although he rarely needs to). if he's way way off, no charge and hoping for a missfire works every so often.
3) if you tap B really fast during the down-B, Luigi goes upwards (same with Mario and Doc, but Luigi's is the hardest to pull off but goes up the most. mind you, most pros can do it to the biggest extentno problem).
Now for Marth
Marth's favor:
heavy
falls slow (which really affects DI)
has a faster up B
up B can push back anyone who tries to block
has no problem dealing with aerial pushes and gimps (well, certain projectile gimps still work, but not so much the attacking ones)
Roy's favor:
his up B can tilt a little to the side.
in all, Marth wins. mind you, the their side Bs have about the same DI.
side note: there's a lot of things I was planning on saying to the noobs who said that I was a moron and that they're more credible than me and nobody should take what I said seriously, but I'll let that also slide. no need to get into name calling or aggression, even if they started it.