Excellent work^^
Firstly we need change of ALL BR. We can`t have pathological situation that ALL 4th rate + Indef have the same BR. Even if we got new PB no one will use Wappen or Inger because we have Wasa that can beat 3rd rate. After that we should start thinking about new PB mechanic.
What will happend with nation that lost all towns ? Players will able to hide in free towns or will forced to join other nation / nation that capture last town ?