Initially I just looked at your pics and read a few of the comments. Then I went back and read what you wrote. The expectant mom picked out the material. She/they were pleased with the quilt you made for their baby. That's wonderful! And that's all that matters. It's always challenging when you're working with material that someone else picked out.
I liked how you continued the theme of the skulls and added your own touch with the quilting in the 9P blocks. They have a unique quilt, unlike any other. Kudos to you and to them for not staying within the box!