Your baby quilts are awesome. Have always liked Prairie Points (have used them on curtain valances), but kinda forgot about them. Thanks for the reminder! !
I don't think it matters if dimensional points look dimensional - why make them dimensional if you want them to lay flatly? (That's what you tell folk).
How about taking a couple of slip-stitches at the top point of each praire point, that will hold them down through future washings.
Just a thought, I'm sure there are others.