I kind of like the Demon Gaze character designs... and not just in a perverted way, either.
I know exactly what you mean. I feel precisely the same about the Agarest titles (which I referenced earlier in this thread) along with (but to a lesser degree of appreciation for) the Neptunia series and a lot of idea factory/compile hearts titles.
I feel like a lot of the artists talent involved with these games far exceeds the rest of Dev teams in their respective roles. In other words, they all prove way prettier than they do enjoyable to actually play. But that is beside the point and something I already touched upon...
However, what I care to point out is that I feel it unfortunate that the artistic integrity inherent in these games gets overshadowed by the fact the content is in fact "pervy" by some peoples standards. Niche, pervy, loli or otherwise, the anime aesthetic in some of these games is downright gorgeous.