In Campaigns as they operate now, you’re able to set the permissions of a group member to either GM or Player, dictating what they can see with NPCs, notes, etc. However, I think it would be useful to let the GM add additional “permission roles” that have access to different levels of content.
For example, let’s say you have a party of characters in a Marvel Multiverse game. All of them have the Player permissions, so they only see what ever tags that are marked for Players to see. However, what if one of my players gets access to secret information during the campaign. What if they’re working for an organization that has access to information the other players wouldn’t have access to? Having additional roles would help better optimize the information experience.