A couple of questions and two comments:
--For the Doctor role, can he doctor someone and hand out the 1-shot bulletproof the same night?
--In the ruleset, it names two specific houses that do things collectively, but in the setup, it says all houses get a vote. Was that a change?
I think the current setup favors town by quite a lot. Combined full watcher/tracker is really strong, and a full doctor, and 1-shot bulletproof against...3 goons? They can't even use the nighttime house lynching effectively since they aren't guaranteed to be in different houses, and they can't be in all four.
Also, you could easily force a survivor claim on D1 by making everyone say "I am in a House" and then having someone else confirm it. You could pre-cook confirmations on N0 (if there is talking then), so the Survivor would be caught in a lie or would just have to be honest, since he isn't allowed to post in any House QT.
I also think a strong Survivor player will be able to tell who the scum team is after a night's worth of House QT reading, since he can see all of them and compare notes. He could spill the beans early and see who agrees.
So all in all, I really think scum could be highly disadvantaged here; partly due to having zero PRs and partly due to the way the setup allows for them to possibly be caught quickly.