My suspicions are the same... which mirror those of Pale Carnations.
Both games started off as rambunctous romps with all kinds of sex setups, both felt like their world was built with 'no limits', and anything could happen. Yet PC, and to a lesser extent DS over time have converged towards harem 'catch em all' snoozefests.
Granted, that was always DS's style, but the feeling used to be more "everyone's fucking everyone" - you and your daughters, you and palace guards, daughters and guests, etcetc...
Whenever I allude to these thoughts on the actual threads, I'll either get hostile dismissiveness (more rare), or just "just gotta wait for more updates bro story isn't over" (more common).
Yet the reality is in both games, they've gone through 3-4 update cycles now with out a single non-mc sex scene - I guess technically PC had the rosalind threesome, but that was meh.