I like what I saw on Boko's Twitter account today, about how he created character models of NPCs for short events.
IMO, GBH as it currently stands lacks real depth. It's mainly been one battle after another with ero animations. Not that I dislike that, but my overall impression was that GBH wouldn't ever match up to Ultimate Fighting Girl as an experience.
Some of my favorite ero RPGs are old free ones like Anise and Passion Beats, which utilized 3D Custom Girl models combined with the creators' talents to depict so many situations, so many costumes, and so many side characters. Now that Boko has started to flesh out the world rather than focus just on the battles and animations, I really look forward to future versions of GBH!