I'm of the opinion that many longarm quilts are over quilting. I think it is fine for show quilts, most aren't going to be used, but quilts for use should not be quilted to this extreme. This can cause them to get out of wack because the quilting is not done evenly. The quilt it self and it's use should dictate how much quilting it needs. Of course this is my opinion.
By all means if your not happy tell your quilter, ask for refund.