Ok, so I just got finished with the current content.
If I had to describe the current content then I'd say it's essentially the prologue/introduction (characters are introduced and you find out what the game is/will be about)
It feels very grindy (a lot of "repeat the same action/dialog to build up stats in order to progress"), which can lead you to wondering if you've seen everything already or if you're stuck in an endless loop.
I'm not too fond of the idea that you essentially are/will become the aunts servant/slave (I prefer to be the one in control or at least don't like being controlled). That's just personal preference though.
I agree that the PC does look way older than he's supposed to.
I was a little confused when the sister had the haircut (it felt weird). She looked like a completely different character to me. I was seriously wondering who it was and then saw "Lucy" and was like HUH? (it may just be due to the lighting difference when she was sitting at the table). I was also confused about which one was supposed to be the mother at first (until it mentioned about sport and exercising).
The game has potential, but it's too early to judge properly in my opinion.
To address your points:
I don't plan on it being too grindy, my plan is to have every "stat" have it's maximum and you get a reward for maxing it so you know you don't have to do it anymore. Furthermore, there will be a finite amount of days in the final version and many events will only trigger on specific days. I certainly don't plan on making an endless loop.
As to being your Aunts servant/slave I want there to be both a sub and dom route for her according to the players choice. I hope fighting back against her control to assert your own will be compelling for players.
I think with the PC I was so focused on not using the same boring ass models/faces/haircuts I see in a lot of other games I wasn't really thinking about how old the PC looked and just went with what I thought looked okay at the time.
With Lucy's hair, I figured out early on that the original haircut was crap and I couldn't adjust it at all so it clipped with everything. So I changed the cut and decided to work it into the story (look for it in an upcoming update) rather than go back and redo some of the older scenes.
Anyway, thank you for your feedback and I hope I adequately answered your queries.