Made some changes to my NS:

Fief 2:
Reinforced Manor to Wooden (+1)
Removed Bailey (+1)

Fief 6:
Improved Infra to Basic (+1)

Took up Concern:
Deeply in Debt (+4)

Total Points Added: +7

Fief 1:
City of Attolia founded (-5)

Fief 4:
Improved to Advanced Infra

Characters:
12 More Character points spent. I now have a Court Jester. Life is good. (-1)

Total Points Used (-7)

Net Change in Points (0)

Edit: Will work on my vassals sheets ASAP, but I have a flight to catch in a few hours. Therefore, I will not be available for a few days. I'm sorry for the inconvenience this may cause.

Edit 2: Just realized... how do city populations increase? Do they just follow the normal overall growth rate? If they do, then I have a suggestion. What if city population growth rate is double your overall? I think that makes sense since cities are meant to be large concentrations of people that grow quickly.