So the result of 4 months of development (I think it was 4-5 months), 400 lines of dialogue (maybe 1200 words, or so, maybe less maybe slightly more), 2 small scenes with Mia and that's it.. I guess that's how a dev can even avoid reaching the SECOND BASE after 2.5 years of development.

I felt that there was even more relationship development in Dual Family within this time frame, though I think it has more spicy scenes then what Dual Family did - I guess frontloading a few naked (teasing) scenes into your game to build hype and then waterboarding the hyped up fans for as much money as you can is par for the course on this website..
Note - is it just me or were close to half of the current spicy scenes already present in the initial release of this game (the intro, all the peeping scenes, and I recall there being a few scenes for each character as well), and the amount of spicy scenes has barely increased within the last 2.5 years?

Edit: I can remember this because I was initially quite hyped for this, and the dev had more regular updates (but all of them were really small, like 2 scenes every 2 months or so with some gameplay and interface adjustments.. Now it's 2 small scenes take 4 months or more with no excuse for why it's taking that long)