That it looks too realistic and not moé enough Maybe?
I think you're only half-right. I don't mind her realistic style, because I really like her works like post #1344968, post #1483063, and post #1599028, but her more erotic stuff just feels... for lack of a better word, emotionless. It's like all of her nude fanarts (and those of eva-st-clare, too) have no feeling to them.
I think the sad thing is, she seems to like drawing nude yuri the most, and I like her nude yuri the least. I just don't know...