I don't think that's much of an objective artistic criticism. Take Anime, for example. I know there are a lot of terrible Anime out there but some are quite good. But even if they are good they are probably still based on a lot of typical tropes, and part of that are "oversexed" females. This doesn't necesssarily mean that sexuality is a major part of the character and the story, it's kind of "just in there". I think being offended by that is sometimes based on an overestimation of the exploitation. I haven't played Dreamfall yet, but I know the game is like the predecessor very much the vision of a single designer. So when something like this happens, it's not likely that some guy messed up in the good team work, it just happens to be part of the style. Not a major aspect of the style, mind you, and probably not meant as explicitly as it is perveived. It's just a slight nod in the direction of "our heroine is an attractive one". This can happen with men also. It's an intelligent game but it doesn't overturn all mainstream notions and what makes an entertaining "adventure" story. Did you know that Lara Croft is probably more popular with women than with men?
But I'm saying this all without having played the full game. It's just unusual for me to see this kind of criticism of an otherwise fine game.