I'm already working on hats! :3 dunno when the update will be out since I don't have as much free time rn, but ye, I think hats are a great idea
As for protogens... the chest armor and legs are easy enough, but I'll have to think about how to add the head/visor thingy. I could also add some generic robotic "clothing"/ body parts, I think that would be more versatile than specifically protogen stuff