I'd finish it for sure - perhaps another border of another fabric that complements the others - or maybe another fabric for the binding might do the trick for your taste. For me, I like it just as you've made it!
I remember asking our quilt guild if they'd be interested in doing a Mystery Quilt and one of the class clowns piped up and said that every quilt she makes is a mystery quilt because she never knows how it's going to turn out compared with her selections, skills and expectations. We all cracked up but then spent the lunch hour commenting about how right she was!