One issue with ripping the feet off is that you have a large flap of fabric loose at the ankle. In outfits with no feet there is a snap at the bottom of the leg at the ankle that keeps the fabric snug.
Now I have two little bear feet left over that I need to convert into something. I was thinking small stuffed animals.
My mother suggested putting socks on him and then putting him in the pajamas, so I'm going to try that next with his other outfit to see if that works. If it does, at least I got some sewing practice in with this project since I may have wasted my time otherwise.