Didn't they make that cover because nobody would ever have bought it with the actual in-comic art on display?
If I remember correctly, they then got into trouble with japanese fans, because the 'fixed' cover didn't do anything to make the art actually in the comic less shit.
Edit: Also, Jubilee > Jean > Wanda > Oro > SG
Jubs looks kinda... I dunno, I like her flashy style, and she's got lots of energy.
Jean looks kinda generic 'cute girl'
Wanda is another, less-attractive, goth-girl.
Oro is... I don't really care about older women, tbh, and I never cared about her character anyway.
SG is a meme, not a character.
edit2: I put squirrel-girl in spoiler-tags, so you don't all have to look at it.
You're welcome.