This one is simple, make it so Jailor can't be transported. A revealed Mayor can't be healed by the Doctor, I assume the flavour reasons are because it's a well known public figure and a sneaky back alley doctor type deal. Well flavour wise, how are you going to fit a whole ass jail cell into your wagon? It makes no sense, transports fail on jailed targets but not the Jailor themselves
One less avenue of protection for Jailor, one more way for Transporter to fail an action. There are downsides, Mafia making fake Jailor plays, Jailor avoids getting swapped into a mess, Werewolf interactions. A whole lot can change from this one small modification