If you analyze it, the few games with this theme (zombie) are poorly supported. I don't think many people like this theme. I know there are people who like it (just like you), but I believe it's a small minority.
The same with NTR games, people keep entering almost every topic and asking for NTR, but those same people don't open their wallets to these developers, and that makes it difficult (take a look here on the site for the abandoned tag, and you'll see that a good portion that is there and from NTR) for a game to survive.
Anyway, little support, developer doing something he himself said he didn't like. It is difficult to proceed like this.
Did he lose customers? Yes, it lost, but that's normal when a game is reworked. Although it's a minority, there were still people who were playing for the zombies.
But if it maintains the quality of the story, I believe it can win new fans, maybe an NTR (totally avoidable), with real people, will get more attention than the zombie rapes.
Just my two cents, not directed at you and not intended to offend.
