I for one don't mind a rewrite every 3-4 updates. I think it gives a break to Eva to refine the plot, reworks some paths, slow down a bit, figure out where to go next to.
Kind of a step back to look at what you've done, where you're going, etc.
And it's more manageable that way than having to redo everything from scratch at the end of the game (as BloodyMares pointed it out once or twice already).
And again, as he said, that's actually something that happen with any and every work in progress. You guys would be shocked how some of your favorites movies, books, hell even VNs, got a last minute BIG change that shaped it the way it was and made it that thing you like so much. Except because you only ever saw the finished product, you never learned about the creative struggles. It's part of the process.
We just have to give Eva some credits. So far, she has mostly delivered, and imo deserves the trust.