Something I have considered for a while is the concept of castle notes.
It would work something like this:
I select a castle near me that may or may not be under my control, and an option appears allowing me to place a note on that keep that is only visible to me. This way I can track claims, make a note of castle ownership to see when it changes hands, assist with farming organization, etc...
Then, if we could expand this concept so that when I place a note I can choose to make it visible to only myself OR to my entire alliance that could really assist with organization and communication.
I dunno, what do y'all think?