Well, in general my thought was this
That pregnancy or anal sex will not make the game much better or fresher than it is now
Question is: does it need to?
Because a lot of people still praise it and enjoy it despite not having any fresh kinks as you say.
If you want better kinks then there are other games. But Cari has always stuck with his guns and knows what his audience likes (i.e. vanilla harem romance that warms the cockles of reader's hearts, LIs that have god-tier asses, a story that's entertaining enough to stand on its own even without the porn).
"If it ain't broke, don't fix it," or so the saying goes.