Once all the content and character sheet are complete I would love to see the ability to level or adjust NPCs. There are simple set of rules in the core book for leveling and there are some upgrages in the Winter of Atom (notiable to lendendary).
So I looked into this a bit further for you and I have good news! The ability to customize NPCs is planned as part of our upcoming GM Tools! We’ll be starting with Daggerheart, but more games will start to receive GM Tool support following that initial version.