No quilt is perfect. A quilt that I was ashamed to enter in a quilt show took best in class. Many times we are our own harshest critics. While a few people may think we have stacks ready to donate, people with more awareness understand the reality. A lovingly made quilt is a fine donation. The community is coming together with love. Your quilt will be just right. Donate with a hug for your niece from all of us.
BTW, I had 3 ordinary flimsies which someone else LAed for last fall for a local benefit. They were very well received.