a) I have not played any other games by this dev.
b)
I only speak for myself, but when a game is tagged with "harem" and starts with a bunch of LIs
but then suddenly ignores all LIs except one, then I am probably going to be at least annoyed because the dev has misrepresented what the game is going to be.
And I say 'annoyed' because it is fair for a dev to follow their story where it takes them, and sometimes that means a game will change as it progresses. So a complete change in the game style is a bummer but expected to happen from time to time.
However, when it really starts to look like this was done intentionally (
i.e., planned in advance) - and that a game was deceptively marketed as a harem game just to draw in more players but with the full intent of eventually turning away from that entire plot just to shove the dev's personal fetish in the most faces possible, now (to me) you have crossed a line that a dev should never cross.
I don't care a lick if one of the LIs is non-binary; it's not my thing but neither is my masculnity threatened by it (like a lot of the screamers who have attacked the dev for including such a character). But I definitely
don't like being lied to to sucker me into getting invested in a game that is intended only to rub one kink in everyone's faces. Do I think the abuse the dev has received made him take this path? Absolutely. But his choice to change this game from one thing to another is a good example of cutting off one's nose to spite one's face - in trying to piss off the fragile masculinity crowd dev has destroyed all credibility in his current and future games. It's a shame because I was enjoying this game.