I guess his skill set does break people's expectation, since they're just looking for another i-win assassin. But if that's the case, he's just going to end up being Shaco + Jax.
I think his skills look very fun. I've always been interested in playing a tank with active dodge (Feint), and doesn't use mana. Also he can shield people. Awesome! I've always wanted to actively shield my teammate(s).
I doubt his effectiveness late game in high ELO though, since Feint is his tanking spell, and is usable only once every 2 seconds (1.2 with max CD). While this would be great against nukers, it wouldn't do much when you're getting bashed continuously by fast attacking carries (there's not many nowadays). You'd be eating a lot more hits at full dmg, which could turn nasty very quickly.
My biggest gripe with him is his lore. It seems that his clan exists to keep balance of all things. But his skills don't have that balance theme to it. Neither do they show the emotionless monster side of him. He needs either changes to his skill names, or modification to his lore to emphasize that he's the nurturing side of the balance, etc.