Yeah, it wasn't slutty. I think it's possible that the bishoujo line itself is so associated with sexiness that Marvel is trying to distance itself from it.
The recent Marvel bishojos have featured costumes that don't expose any skin. (Except for Lady Thor, but that too is minimal.)
And Marvel comics costumes are changing in a similar fashion.
There is still merch from other companies currently in development that feature sexy Marvel costumes, but these recent events in this line lead me to believe that Marvel is figuring out their bishoujo game.
Good news is that Koto says they still have the rights and new statues will come out. Let's hope.