Was curious to see what the new version was like, but after looking at this thread... guess I'm dipping out. The original game had a decent premise and some potential, just bogged down by the onslaught of new side characters being introduced every patch and lots of teases for content that just never happened. Sex scenes for the family members (a.k.a. the main cast), girl-on-girl stuff that was implied but the player never got to see (or if you did see it, it was extremely basic), even futa characters that'd have nude shots with their cock out but probably wouldn't have ever had scenes due to the glacial pace of development and story.
Kinda makes me wish I had experience with working in Koikatsu/Ren'Py (and the time and willpower.) I think it'd be fun to take that original concept (male protag in a modern fantasy setting, getting encouragement from his girlfriend to make a harem out of his sisters/mom/some other women), change up the characters/plot to make it more distinct, and make a "here's how I'd do it" kinda deal. Try to focus more on scenes with the main cast, less cock-teasing and more cock-pleasing when it comes to girl-on-girl/futa content (idgaf if it's "divisive" content), and severely cut down on the amount of side characters while still allowing for some variety. (Although at that point, it might end up feeling more like Peerless Lust with less of the "power fantasy" gimmick.)