I fully agree. Hopefully there won't be any clones in the next game. Just compare Mario and Luigi in Brawl to them in SSB1. They play very differently now and, while similar, are no longer clones. I expect them to be even further differentiated from each other in SSB4. Luigi will likely have his Poltergust 3000 incorporated into his move set. I could see it being used as his down special to pull players/items/projectiles towards him, then either damaging, using, or launching them. I'd like Mario's down special to return to his tornado spin attack, but this time being similar to the one used in Super Mario Galaxy.
So that shows that we can still have similar characters in the game that aren't clones of each other. Toon Link should have a move set and final smash taken only from Wind Waker and the DS games he was in. Let's just hope they follow Mario and Luigi's example and make all similar characters unique. Or we could just give everyone a Landmaster for their final smash. Yeah, that sounds like a good idea.