That actually makes no sense at all.
1.) Not many NPCs are changing their clothes and this includes the ones in armor. So why would I have to?
2.) Looking like a knight, wearing full armor, appears to gain people’s charisma (as I imagine it would) which makes a lot of sense. Being decked out in shiny plate armor, yes… you would gain charisma not lose it.
3.) It’s a game. It’s supposed to be fun. It wouldn’t be fun, given how often I enter and leave towns, to have to change my equipment every single time. That’s irrational… and you know something? Probably realistic given the difficulty of putting armor on in the first place.
Never seen this. That isn’t to say it doesn’t happen or can’t, but please have proof showing you equipping this thing and it raising you charisma by 6. Otherwise, no. Also, let’s assume it is true, you’re telling me it makes sense to add additional slots because there’s another ring?