That's not an issue with the game. That problem comes from your perspective. If this was the first game you played with that setup it wouldn't be "old", right? You can't fault devs for your choice of games to play.
The fact of my comment still remains the same, dead/cucked father is the biggest trope in the AVN market, even among non-Incest VNs it's quite common. You're talking like as if this game is the first ever AVN created, and that it's not entering into an oversaturated market, rife with overdone tropes.
I can't fault any dev for the choice of games I play, but I can and am faulting this one for their unoriginal foray into a pre-existing market with a pre-established player-base. Being a new game by a new developer doesn't discount this from being compared to other games/genres that populate this site. When you're venturing into a market, you gotta know the audience, and you have to know the competition, acknowledging neither of them will just result in your own downfall.
Having a unique selling point gives you an edge against the competition; if you think "potential new players" is an excuse to make hackneyed incest narratives, then you're sorely disillusioned, and only encouraging the dev to seek failure, both critically and financially. And let's be real, even if I was new to this site, why would I play some new, barebones and frankly ugly looking VN, when there are better looking and more popular options available?