I think it is important to keep in mind the thoughts behind the donation. If the quilter is new and isn't sure what they are doing, or haven't developed the skills yet, but is honestly doing what they can to make a useful quilt, then I think it would be worthwhile to pull them aside and offer some tutelage so that they can improve their skills. Or if you are uncomfortable doing this one on one, offering a workshop every month, open to everyone involved, that would cover basic skills - seam allowances, selecting good fabric, etc. This will need to be done gently and lovingly, not critically. The reason I don't participate in QOV is because their requirements are so strict, I don't think my skills will meet them for years to come. And I didn't particularly get the impression that the people involved were willing to help.