Hmmm, personally I don't think there's anything wrong with that since many games do tackle with different niches at the same time. Like those where you can keep your wife loyal or make her cheat or those harem games where getting multiple girls is optional.Those that just want a particular niche in these game could just play that part of the game then if they strictly don't want to do the others.
Besides, dev said that first version is all gonna be NTR-like so I don't think people would get confused. If you want that content then only play 1st version or if you don't, then wait for second.