Doubtful. Sonic, despite being a lightweight, would be worse without Rage, as would Sheik, Pit, and several others. I once saw Sonic kill a Fox at 59% with an up smash. That is, in no way, shape, or form, "excellent balancing." That is pure, unadulterated bull****. That never would've happened in Brawl or 64. People don't even die that fast in Melee.
Higher. With the introduction of Rage, attacks at 0% are much weaker than they would be in any other incarnation, thus removing the usefulness of some moves without Rage, making comebacks extremely hard, and crippling characters like Jigglypuff and Falco, who have hard enough times killing as is.
That's not what I meant. I know the knockback scaling mechanic is the same, I mean the scaling itself on attacks is different.