Well, major letdown, the mc (according to Tiffany, at least) is infertile. Sigh, yeah it's a fetish many don't have, but it does lessen the game, in my opinion.
Wats the point of building a harem and securing all the women you can if you are a genetic dead end?
The sex scenes feel less impactful as well. An exercise in futility. Not every game can or should put in full pregnancy system like Peasant Quest, but even a few cutscenes at the end of the game with the MC's women being pregnant could have made it feel like all his effort had a purpose.
Steven (MC's father) will never have grandkids even though from his phonecall in the Amber route does want them.
On a side note given his abilities the mc should be immortal but what about the other superhumans?