If you are very close to your granddaughter, show it to her and ask her how SHE would change it. Odds are, she won't want you to change anything, because it came from you. If it's a problem with spending time quilting it, send it out to someone else to quilt, so your DGD will get a chance to enjoy it. Besides, the quilting will probably it look better. So far, I am lucky enough that every quilt I have made had turned out better than I hoped, after it was quilted; any mistakes seem to "disappear", and the quilting just brings it all together.
Remember, this is a quilt your DGD requested, and it was made with love by you. She will love it, and that's all that really counts.