I'm pretty Sure he only listens to his Supports about what to add to the game which is fair, I've been asking him to add Boob content for herba since she has the biggest in the game but sadly it seems we will never get any unless he somehow brings her back which i doubt he will. For all we know he probably has some behind the scenes supporters who pay him a crap ton of money for a custom scenes so he's probably way too busy to listen to others.
To be honest he seems just the kind of guy that only does what he likes and what he feel inspired (and he does it in an almost maniacal way) and doesn't care about suggestions that are not his cup of tea.
If I should put my money on the next thing we could see as next "fetish" added beside of foot fetish/facesitting/farting/wrestling/pissing imo it will be not futanari or pegging but more likely... scat, not because somebody ask him to do but probably because he's into it.
Sad but it is over, numericgazer has become yandere dev and will just milk the money, game will be incomplete for years to come. The rework from the old witch fight should have been enough of a red flag, but we chose to ignore it...
About the "milking the patrons money" thing, I had to point out that beside some videos there's no reason for his supporters to choose nothing than the 1€ plan, and that's almost a symbolic pledge.
If you choose to support him it's not because you seek for a completed game in short time but more for keep him working on the project in the long run. And that aproach seems working since even today he's earning more than 1600€ per month...