At screenshot you can see usual my character window close to end-game.
As you see in small diplomacy window far too many icons too see something.
There are 4-5 useless coalition icons, dozen raiders icons I don't care, wars I wage (not now, and they are duplicated in right-down of screen at least for my wars) and one interesting thing - long list of my truces.
This is I guess only place I can see - who can I DOW next and when and who I can't. And with new interface it is not so simple as I could expected when you big enough to be target of coalitions, raiders and many truces.
Generally I just want to suggest add new plank for diplomacy on this character window, making titles and claims plank wider too , or on another screen with same plank show wider (as it was in the first versions of the game), like still existing screen with your owned titles.