This setup is very similar to a 9p normal setup designed by bork jerfkin that I played in my first ms mafia micro game. At the time, the setup was thought to be slightly townsided.
I made 2 changes to the setup: Mafia had daytalk, and the Doctor was limited to 3 shots, rather than being a full doctor.
I thought about giving the mafia team an additional PR (rolecop), but was dissuaded by Cabd who did a quick review of the setup. He suggested an informed mafia role (knows that town has a doctor) at most. I felt that the mafia strongman ability was enough to tip off the mafia team to the presence of protection, so decided to go with my initial design tweak.