I'm not prejudiced against femboys (I like games such as Pandora no Mori) but it's pointless to talk too much about it because Boko877 hasn't demonstrated any interest in having femboy enemies or protagonists in any of his works. I personally just don't see it happening. (He's not someone who ever polls patrons about what fetishes they want to see, either.) Also, the person who originally brought this up has apparently had their account deleted...
It seems like the next update of the test version of GBH3 will be out soon, but Boko said to not expect too much new content; he put a lot of work into rewriting the internals so that a single technique can do damage at several points, aligned with what happens in the animation.
Edit - Boko just said that there's another delay, due to his family's troubles that he needs to take time to deal with (which was also the reason for the last delay). So more waiting for us, I guess.
Edit #2 - He's back and said the update will be out in a few days. Sounds like he plans to replace Heavy Slash with a counter-type move...