I agree, hentai doesn't belong in these boards, we'll save that for that dumb *cough4chancough*.
I don't think they overuse sex appeal with Krystal, because she's not as bad as Zamus with her skintight getup but more so than Peach or Zelda (at least in smash). There really isn't anything to compare it to for the SF games, but compared to some of the biggest sex icons in the video game world I don't think Krystal lists very high (let alone Zamus....).
Where's there's fur, there's furries and where there's furries, there's hentai. We just got unfortunate with that post a couple days ago. Most of us agree that SWF doesn't need stuff like that.