I disagree. To me, there's very little point in getting a girl pregnant if you don't get to see the results, so I'd rather get fewer girls pregnant if it means I can accelerate all of those which I do impregnate.
It may be an unpopular opinion, but focusing on the fertility is much more hotter than accelerated pregnancy. Just because a girl removes birth control doesn't mean she will 100% get pregnant. Of course now it's hard to implement, since it would probably force to reread tons of coding, but it would be nice to even give another light usage.
Of course it's just my opinion, but focusing on increasing a girl fertility (or even have twins for example), or even have the option to corrupt her body to only accept her sperm would be another option to use the lights. But again, personal taste, and I understand that specially the last example I gave above may feel a bit too sci-fi for some. But just wanted to give an idea of the importance of the immersion of the events to the corruption theme.
Personally, the issue of accelerated pregnancy is that it doesn't have a purpose. Why should you waste on options on that when others may even help to advance the story? To simply see the scenes? It needs an objective. Unless it has options like showing to their families/lovers (imagine showing the kid to your dad for example) or even breaking even more a girl as a slave (not my thing btw) I don't see how it will popular among players. I'm pretty sure it would be more popular if it had a more specific purpose. After all, they are already pregnant, just accelerating to have a belly feels weird imo.
Btw, in no means I wanted to complain to the dev. I know I'm being frontal about what I don't like, but I'm like that when I like a game. I much rather prefer to be honest to a comunicate dev about a game that I like than making him guess and wondering if his fans are or not enjoying every aspect of the game. Games aren't perfect, and it's impossible to please everyone, and don't want to appear a dick just because I don't like a specific aspect of the game. Just giving my 2 cents.
Sorry for the wall of text btw.