What's the exact intent behind halving the vassal limit?
Also, how would one expect the Byzantine Emperor to reorganize his titles and holdings if left to his own devices for a while longer with the half vassal setting? Would he be creating new duchies, with their own sub-vassals, to give to other vassals? Would the Emperor recreate two duchy titles for himself, so, despite losing his initial duchies, at some later time he'd be a double-duke again?
Also, how would one expect the Byzantine Emperor to reorganize his titles and holdings if left to his own devices for a while longer with the half vassal setting? Would he be creating new duchies, with their own sub-vassals, to give to other vassals? Would the Emperor recreate two duchy titles for himself, so, despite losing his initial duchies, at some later time he'd be a double-duke again?