You can do what ever you want to do. (Said with enthusiasm). I have several quilts with no batting. They are Sunbonnet Sue and are tied. I believe they were called " summer quilts" during the time period they were made, during the 1940-50's. So make yourself a quilt just like you want, no batting, lots of big fluffy batting or in between. There are no strict rules, quilting is an art to be enjoyed, not a task to be regulated.
Carolyn