HI,
Well I can tell you from experience on this side of the coin...a new LAQ and just customer service in general (I have had dissatisfied customers myself)...that I want to know and try to fix any issues that the quilter has. If it is something fixable...and that is something that is fixable. She can easily pin that on again and add more quilting and I really think she won't mind....I think it is just a matter of honesty and if your other two quilts were done well...you should give her a chance...we can't fix what we don't know.
Just my two cents worth. Quilting is so subjective ....so it's hard to gauge sometimes.