Being able to permanently remove a leader from service would be good, yes, but only Paradox can add that button.James Mason said:It would be fun to have a button near "Promote" and "Remove" where you could "Eliminate" certain leaders if they screw up royally (well, I suppose they don't really screw up without our help, but s**t flows downhill...) or if you just don't like them (adios, "General" Himmler).
Perhaps exile them to a colony in Africa or something where they will just wither away or get conquered...