I usually RP generals with those traits as "exiled". "Here you treacherous bastard, take this army, get out of my sight and don't come back, have fun sacking your way toward your new home". I Keep them out of "homeland" or "expansion" territories to simulate "exile", and don't let them have any new factional troops in their armies. When exiling the character, I take away any elites and give them to a loyal general.