After extensively playing the game, I can safely say that this is the most balanced and fairest smash game to date, and I am so impressed with Nintendo's work.
I can't wait till the Wii u version!
That said, I wish you had to unlock more characters. The starting roster is way to big, and I unlocked all the stages and characters within 24 hours of getting the game.
Seriously, I googled it and was like "that's it?"
Online is incredibly fun too, even if it does lag sometimes