I'm so excited to get a new X-Men cartoon that I'm very easy on the new designs...they are not perfect but I do appreciate the nostalgia factor. I'm sure Mystique won't be a full time hero in this.
I like Magneto's design though. My favorites so far are Magneto, Rogue, Gambit and Cyclops.
Glad to see more Iceman in this. the thing I hated the most as a kid in TAS was the lack of more Iceman, Colossus and Psylocke. Beast and Archangel got some decent episodes though.