better & more organised cities
cities will leave a no mans land between other cities, & if a person tries to setup a new city, they will maintain distance between other cities, not getting close
cities will be more organised, and smaller, buildings will be in rows, roads will fill the inside, hotels that can hold upto 100 people
this could be a beginner for walls if they are recontinued (and sieges or organised battles due to the no mans land) because one of the problems was that "borders are constantly expanding", so instead, make the civilians set up buildings for later, ex: population is 50, they set up 2 - 3 hotels for an extra 300 people, and take up enough space for later to setup all essential buildings, enough so they arent expanding every minute. Farming is done outside, crops will wield more due to a bigger population
cities will have their own economies,with gold circulating, and tax will be like 10% of the gold circulating, or chosen by the leader, and there will be markets selling basic weaponry or clothing, with each job favouring a specific set, like the farmer favouring leather, and miners favouring heavier armour like silver armour. Markets don't have to be owned by the government, they dont have to sell everything and can depend off each other, ex: there is a shop with miners working for it, blacksmith can buy from them and sell swords, government can also buy from them to supply army. Sellers have to pay tax every purchase#
houses can be built, but they're more expensive & contain less space, but the inhabitants are in a better mood, apartments are mid, and slums are cheap but much more people however put inhabitants in a bad mood, richer nations will refrain from building slums
to make up for this, different buildings like, public baths, theatres, sport grounds, etc are made to make people happier
lag wont be a problem, as most tasks will be done inside