You know, this is a completely random post with all of the Rhythm Heaven talk going on, but I was arguing with @
DukeNapoleon a while back about Roy and how I would not accept him as a Lucina costume.
You know what I would accept him as though? A slightly Luigified Ike clone. I know that this is probably not a very popular opinion, but I was talking to some friends about it this weekend and I think it could work. Make him smaller and faster then Ike, give him his Melee sweet spot, and change Aether to a recovery that makes more sense to someone that is not Ike. Give him a few of Marth's attacks and his Melee neutral for added diversity if you really feel like it.
This would make him a rush down FE Lord that is between Marth and Ike in weight, power, and speed. He would have his Melee sweet spot and fire effects. That's all I would really need, and it would be more in line with what I want out of a Roy then a Lucina skin would be. He wouldn't even have to be the primary character in this hypothetical. You could have another Lord, or several Lords, on the same spot with a variety of skins (if this was the case I would want a set of custom moves to have the fire effects for when I used Roy.)
Once again, I am not sure if this would make many Roy fans happy. I would be all for it, though.