This is the crux of the problem in my opinion too. There is absolutely not a f******ing thing of interest to do on the campaign map! You start up nother game hoping this time, something might mysteriously spring out at you in your travels -and it never does. Thats where they failed miserably with the idea of Sandbox -its like sending a kid to a sandbox with literally nothing in it but sand. So you start a new game up -"should I go North, I dunno South? Maybe NorthWest this time..." Why? It doesnt matter as nothing will happen, theres no interesting characters to meet and no reason to enter any city or town because absolutely NOTHING will happen.
Exactly this, they had plans to make crime and IIRC even an underworld where you can have your own gang and have gang-management. so now that its been basically axed, you can't do any street-fighting except for the hell of it, and play a pure bandit/gangleader role and make your way into lordship that way. They still have yet to add any dynamic to the campaign that isn't combat with the end goal of sieging a city and more combat until there is no one left to fight. There was also the whole thing where supposedly cities would have street battles between siege and keep phase, but there has basically been no mention on what happened to that.
Their view of Sandbox(defined as a game where you are given multiple options to achieve a goal(s)) is the most strict and slim implementation, a very small number of avenues to a singular goal: world domination. What does war need? Money and men. How to get men? money and combat experience. How to get money? Trade, fight/loot, tax, and business meta.
With the above mentioned, outside of combat there is no sandbox, because there is literally no secondary options for raising reputation with notables except for questing. Only way you can raise relations with lords is questing, or occasionally saving them. marriage? that is so you can keep playing when you die. bandits? Gotta level somehow, because quests are not going to net you relatively jack pretty quickly.