Mario doesn't get his **** ***** as easily. Have you ever tried to combo one of the bros and NOT be Falcon?
I think you mean, you're outranging them, is what you mean. The only reason Mario isn't as good as Doc is he doesn't have enough sure kills. You usually end up getting kills at either super high % or edgeguards.
Also, Link isn't nearly as good as Mario. He gets ***** by anyone alot faster than him, and you have to fight in almost everyother matchup. Like his best matchup out of high tier is Samus, and that battle is annoying as **** anyway.
Even Peach sucks **** to fight against, Link is lucky to be where he's at right now. Nair isn't that good = (
EDIT-What I mean is, Nair isn't good enough to bump him up into mid tier.