Is there anything you wished you had put on your registry that you didn't?

That sounds like plenty. Boots? You won't use them at all, I suspect. You'll want simple short-sleeved onesies. It's a good first layer, and you'll want baby to stay warm for diaper changes, etc. I don't think you'll need that many sweatpants, either, but that's me. You have plenty of fleece, it seems. You can't plan for every need, so you may wish to float that you'd like gift cards.