It will be easy for sw to add it as long as there is a demand people just need to send their saves. If zip is too big uploaded saves to file sharing site like mediafire and paste the link in description box when submitting save on sw website. what the game developers have done is used your psn id as part of the save id. The game checks your save id matches your psn id This id is all over the place in the saves and resigning saves doesn't mod them.