I've seen some kind of a ruckus about futas here, so i'm going to give my perspective: As this is a harem game, futhermore, an incest, too, i think there are greater things at stake than MC's ass. To me, the most important thing at all is that any penis-related stuff in the harem must be with the MC's only.
I normally don't mind Futa/trans stuff, i actually like when Devs have the balls to at least make them optional in the game, but i usually don't like when they take an active role, instead of passive. Of course that between hundreds, must have had one time or another where i didn't minded about it, but in general, i don't enjoy it.
There are some nuances to it, and this is the first time i download the game, so i still don'tknow what to expect, but when the MC is a futa, i don't like males involved and when the MC is a male, i don't like futas involved (in a active way). Summarizing, if i have to chose between futa x male and futa x female i would preffer the first, 100% of the time (considering that it needs to have penetration involved, if it doesn't, then it's all cool).