So, just because he's more difficult to master than the others, you want him out? What about Ice Climbers then? Yoshi and Ness were more difficult, too. The Mario-universe also has a big representation. (Ice Climbers is an unfair comparison, I know, but you get the idea.)
It's a shame that an original character like Mewtwo gets the cut (original = not a clone, btw.), whereas a clone like Falco is still in. I just look forward to seeing a confirmation saying that both Wolf and Falco are unique. (Same goes with Ness and Ganondorf, yeah.)