Yeah, I think that all of Oni's visual choices have been pretty good ones in terms of character design.  Kitty and Rogue are both slightly altered, but still recognizable and looking good in the game, and Laura is much better with the look from the comics I think.  I'm not sure if Emma Frost ever actually showed up in X-Men Evolution.  I think that both She and Psylocke were planned for the 5th season that never got made.  There's concept art of them floating around for how they would have appeared in the show, but they never made it in.
It's really more of a surprise that characters like X-23 or of all things Gwenpool would be making game appearances before characters like Storm or Jean Grey.