Fair, but when you remaster early and very clearly still haven't learned much, you're just going to make new mistakes that will (again) make you want to re-remaster it later. It's not obvious to puzzle out, so you're generally better off waiting until you're confident you can pull off something solid
Also, I would never suggest drastically altering your core gameplay like it seems the dev did here. If anything, it probably gained them very little/nothing and apparently cost them a lot of the support they had
The current supporter number is misleading if you only look at that. At the end of July (when the remastering was well underway), they had 41 patrons. So I don't think it's really affected them all that much. True, the last couple of months have seen a bit of a drop, but from February to July it was still high 30s to low 40s, so there wasn't a huge hit they took in numbers. Additionally, at such a low total number (around 40), while the
percentage is high, in reality only about 10 patrons isn't all that many to lose. Obviously it will have affected potential momentum, but it's not all that huge of a hit in practice.
There are arguments to be made both ways. I'm neither justifying nor condemning their decision. They have their reasons, and it doesn't seem to have hurt them much. Some devs do a rework and then a rework again (*cough*
Aorrta), but a single rework doesn't generally equate to the dev later wanting to redo it again.
What I can say is that with the remastering so far, I've liked some of the additions, both in story and UI. (For instance, I feel like the story flows a bit more smoothly, and some additional twists have been added, and it's only halfway through the rework.) I would hope that the dev took time before starting the rework to plan things out more thoroughly so there will be little reason to want to adjust anything in the future. I guess we'll see, but I'm personally happy with the changes I've seen so far.
Despite what I said about preferring a rework earlier rather than later, BDS has still another 3½ episodes to redo, so they didn't jump on the rework all that early, TBH. I don't know how many episodes are planned per season (since this is Season 1), but if we suppose there will be 10 each season they were already over halfway through before making all of the adjustments.