I made a quilt top several,years ago, sent it to the longarmer and the finished quilt, once I received it, had tension issues. The longarmer suggested a charge of $60 to remove the flawed quilting and requilt, the same amount already paid for quilting. Yes, it was long and tedious, but I pulled out every stitch myself. I also inadvertently created some snags and small tears. Today, the quilt is requilted, those picked places and the tiny tears (I placed fusing between the quilt top and the batting to close the tears, then quilted over the area to secure it) just aren't noticeable if you don't go looking for them. People who have seen this quilt say it is quite striking. Me? I'm so glad it is finally done and moved on to its home.
I suppose the message is to please be more careful than I was when removing stitches. I think you are probably much more experienced in all the steps of the quilting processes than I was when removing those stitches. Good luck, and happy unsewing.