I used the Jam Trial version so I don't actually own MZ so it's gonna be a hard No for the foreseeable future lol. Even if I did own it, I don't think I would refine it, at least for the time being. (At a bare minimum I'd fix the small typos and other errors but nothing major. It will bother me a bit those are stuck in there). I actually finished the bare minimum I wanted with One Final Wish. I had plans for extra content and a NG+ but that was also extra and nothing I was going to push for. Maybe one day down the line when my other game is finally finished I'll go back and refine/remake it but for now it's just as it is. For now I'm just trying to work on my massive project that's been on my mind for years.
But everything I learned while working on the jam as well as the feedback I got I've already put towards my main game so even if I never update One Final Wish again the mere existence of it helped shape my other works and that's good!