All good suggestions. What I noticed is that the fabrics in the quilt itself are wonky geo prints, so the wonkiness is not inappropriate at all. I would show it to the mom, myself, and see if it bothers her. Maybe don't mention the problem at first and see if she even notices. The little girl will probably love it, no matter what, but you can console yourself that the whole design is a modern abstraction that does not require perfect alignment. "A foolish consistency is the hobgoblin of little minds," Ralph Waldo Emerson.
"We are our own worst enemy when we torture ourselves with perfectionism" - me.