I agree with the others... just get it quilted in the best way you can (and don't point out the issues you had trying to make it perfect). She would be DELIGHTED to find that under her Christmas tree even if you just did the meandering puzzle pattern on it for quilting.
I never was a perfectionist until I started quilting... and I don't think it's one of my better qualities now...LOL I'm NOT a perfectionist with house cleaning...and laundry... but with my quilting...and flower gardening.. I am and sometimes I make myself NUTS over the most minor things.
She will LOVE the fact that it's finished and I'm sure she will cherish the fact that you made it happen!
BTW? She did a very nice job! Had rotary cutters not been invented I don't think I EVER would have started quilting. I am not patient with the cutting aspects, but the rotary cutters changed all that!