i'm kinda in the middle but edging towards clones. I'm not totally for "clone". I don't know what to call them because "clone" is a little harsh because it would mean they are exact copies. I don't believe there are any characters that are clones but I do believe that some character's movesets are too similar for me and not original enough. Like, fox, falco, and wolf have lasers, shine, and same up-b but all three play so differently. Don't quote me though, I don't know enough of Brawl. And like marth and roy (in melee) have essentially the same moves but roy had some fire.
I guess i'm for not clones but I do believe that some characters have similar movesets, characters that Nintendo should have made original movesets for.