I'm here before the storm. My opinion, the sprites seemed to be better as digital arts. Redraw them into watercolor may caused the sprites to blended into the background. But I haven't seen your sprite watercolor version yet so I just make an assumption.
I was worried about the cohesion with everything else, but I'm glad you like them as-is! I've made a completely watercolor VN before, so fingers crossed it'll look something like that.
The NaNoRenO jam version will stay up regardless, so the version with digital sprites'll always be around ;0;/