I think the Duke Nukem Forever reference is most appropriate. If you ask me, work with what you've got and make an awesome game out of it. After that you can make an even better sequel with the new art scale and many exciting new features.

I think there are already a number of reasonable RPG engines out there in the open-source world but the main problem is lack of a polished and complete game to actually make use of the technology. You're a great content creator, Clint, and that's what the open-source community needs right now.

After throwing those thoughts out there: Do what you feel comfortable with. You don't owe anyone anything so continue working on Flare (or abandon it) as you see fit. Thanks for sharing what you've achieved so far.