My thoughts are:
1. The name is perfect
2. Don't worry about the seams showing through. Interfacing will only add to the heaviness of the quilt. If the seams show, it will be OK
3. You might want to think about a very light quilting, or even tying the quilt.
4. Write the lable from what is in your heart for this girl. That's what counts.
Blessings to you for doing this important thing for this girl. You have made a huge difference in her life, and you may have made a difference in this world that you can't see quite yet.