I was offended in the sense that Nerds are offended by things which are stupid, so that's what I ticked. The guys fugly and uninteresting, the chicks wearing that dumb armour with holes in it, I mean a chain mail bikini actually makes more sense than that (in the sense that holed amour actually hinders you by slowing you down with little to no benefit), and shes standing in that position crappy comic book artists put chicks in so you can see their T & their A in the same picture and pretend it's "simulating movement". (The fact that you can't actually see her "bits" just makes the picture that much lamer)
There's nothing wrong with "appropriate cheesecake", put poorly drawn women showing skin in situations where it directly harms them, both insults my intelligence and implies that the women are only there for guys to look at, as opposed to being full fledged characters in their own right. Who also happen to be very nice to look at.
There's actually a lot of 4e cover art I don't like that much, but the PHB is one of the worst.