maybe make special hats that you can only get by doing certain things like maybe kill x amount of guards in one round to get a hat or something. maybe put more chests in the map and then give a special hat for finding all the chests, etc. you can't go wrong with more hats, and it gives something for people to do if it just so happens that the warden is dead but there's still several guards that can suppress riots.
imo there should be a system that promotes a guard to warden if the current warden dies and one to two minutes go by without anything happening. like maybe the guards vote in a new warden and that warden takes over for the round unless if a: there are less than 4 guards, b: there are less than 3 prisoners remaining, or c: someone (guard or prisoner) has been killed (not Self Delete) within the one to two minute time frame.