Awesome quilt! You are really talented :) I love applique.
I'd keep the circle quilting - it adds a unique look that's quite appropriate for the moon. I like it a lot. As a longarmer, I'm always searching for and using unique quilting patterns to add another touch of interest to special quilts. I think it really enchances a quilt. You choose well :)
Again, wonderful quilt.
Debbie in Austin