Well there is a simple thing for having it not add a lot to dev time, simply keep them for important things, running on the beach yeah maybe leave the animation out, Emma finely realising her foot fetish and given us a footjob, sure have it for that.
This game doesn't feel like it is going to jump into a fuck fest, so if only sex scenes are added then it won't slow things down too much, you don't have to add fucking every update if people are still playing this game clearly it is those of us not fussed on there being tons of mindless sex, I am a supporter of Sylphine and I have played the alphas, there is no new sex coming to the next update and it is certainly not hurting that game, nor would it hurt this one.
It does need animations, if after all this delay and build up sex with Emma for example it is just static images it would be hugely anticlimatic.
I mean come on, it's playing the hero, the ultimate reward is saving and getting the girl, it needs to be rewarding, and image of our dick at Emmas pussy lips, then half in, then all in, back out and in, then a cumshot ain't going to cut it by the time it finely happens.
Of course, I assume we are going to have sex, let's face it if any game could make sense with no sex this would be one of the few, certainly with regards to what Emma's mum went through.