thanks for starting this thread. I do long arm for others and have to say I've found that it's best to look at the quilt with the piecer to see what may be challenges in the quilting--i.e. she wants lots of stitch in the ditch (which is NOT a long arm favorite and many charge extra for that--use your domestic machine if that is what you want cause it works better) but the seam pressing would no allow this. Or there are obvious waving borders even before I get it on the frame, or seams that aren't closed, etc. Obviously, this works with local customers. Then we decide together what he/she wants to do. But I'm looking to increase my clientele with via social media and that may mean more quilts in the mail, so this thread has me thinking about the way to handle this.
That being said, I do think we need to remember in the original post the quilting was a panto which if it wasn't computer/robotic guided, then the quilter was standing at the back of the machine and looking down at the panto and likely did not see the mistake.