Controlling armies is one thing, but is it the intention that characters would be able to "teleport" as they can in CK2?
That would, in my view, be a terrible wasted opportunity to increase immersion; if the intention of the game, as stated, is to move more towards an RPG-type focus, characters being "physically" present somewhere on the map - and thus able, depending on their location, to interact with other characters or lead armies etc - would be a great move for representing the functioning of a medieval society.
It would also be a really cool mechanic if tied to the reworked retinues - e.g. imagine you'd like to arrest this powerful vassal who's at your court, but he's come to court with all of his retenue, while a large part of yours is away keeping the peace somewhere, so his retinue outnumbers yours. You thus have to enlist the support of other vassals who are also at your court, in order to get the arrest done... Etc.
Will be pretty disappointed if there's not at least a game rule for tying characters to a physical location (aka "limiting teleportation") :/
