This would be pretty hilarious. It would be even funnier if it was Fox though.
Or... Zelda.
What is it that he needed to be nerfed for?
If from now: no reason just for sick kicks, but before from Brawl to SSB4: laser spam and his incredibly fast meteor. Sure, the laser end lag is a bit much when you consider what Luigi's Fireballs can do, the customs for Dr. Mario and Mario, Rosalina's Star Bits, and ZSS's Stun Gun, Falco's Blaster is probably one of the worse if the worst projectile in the game.
Wolf's Blaster at least had a bayonet, good hitbox, and knockback with growth. Falco has no safety at close range and the laser is, well, a laser that doesn't travel fast and doesn't benefit from knockback growth. If Falco's Blaster lasers traveled as fast as in Brawl, he fired at the rate of Brawl's Blaster, or had the range like in Brawl, it wouldn't be a problem. Right now, they're a slow moving projectile with a thin hitbox and little redeeming qualities: stun effect and sort of being able to gimp if they hit after someone does a second jump.
Falco's Dair, however, was insane. It was like frame 6-10 and meteored well compared to Wolf's fast, but weak meteor. I don't really care about the change of that mostly because I didn't play Falco much in Melee or Brawl, but having a Dair similar to Captain Falcon and Ganondorf's is all right.
So, I think the Dair change was fine, but the Blaster changes were a bit too much. Well, design choices, it wasn't that great. More speed on the laser travel, more rate of fire, or more range would make it less crappy.
Melee. Fox was nerfed in Brawl, now it's Falco's turn.
Except Fox went from, "Holy crap, this is insane S-tier!" to, "All right, almost top tier in Brawl with Wolf", while Falco dropped from top tier to mid-tier at best.