I, um, wouldn't mind a better skill match-up system. I'm not exactly awesome but nor am I terrible. Beating people who are a lot worse than you sucks because it's really unfair on them and they tend to quit. Playing against pros makes me want to cry.
Like even of Soul Calibur where they had a levelling system for online it would still offer you a fight against a level 50 or whatever even if you were like... level 2.