Surrrsly, moar Cassie skins, but keep them reasonable. A woman can wear an outfit that celebrates her figure without looking like a stripper. I'm not trying to be preachy, I think they did a very good job with her current skins (minus the hair on her Endurance skin). I'm not trying to be preachy, just sick of so many (nearly all) females in games being dressed fuckin' ridiculous.
Poison's dress and tattooed leg costume from USF4 is amazing. It's sexy and its cool. It has a theme and it definitely shows Poison off.
My thinking on character design is that the primary skin should be practical and realistic within the context of the game. I think Cassie's base outfit does a pretty good job of this. It's a little.. Busty, but given what else is out there for women in games, its very reasonable.
The secondary, tertiary and so on skins though, sky's the limit. Just respect the character.