She's right about the newest information being not to put anything in the crib.
I still make baby quilts, however, because they are so useful for other things - putting them on the floor or the ground to let the baby play, taking along for the baby to nap on in church, etc.
I put poly batting in most of my baby quilts, partly because it is very durable to wash and can be quilted more widely than most cotton battings, but partly also because I have a lot of poly batting that was given to me free.