Rebellious Soul: The idea is that this player would have the ability to corrupt the neutral deity of either Haven or Dungeon, targeting a specific player. For example, if they choose Haven, and player X is killed, the Rebellious Soul can change the target to player Y. This way, winning becomes impossible, but it's easy to disrupt the game for the Mafia or the city.)
Regarding players: I think it might be worth reducing the number of Ghosts.
And turning the Rebellious Soul into an NPC, where a new victim is chosen by selecting a ball with a number corresponding to the "assigned" player. To give the city more chances, some resistances could be given to the roles.