Since there are several factions, I am proposing a stat called Reputation. So, this can be presented something like the following:
- Feygard: 786
- Nor City: 25
- Thief Guild: 122
- Whatever factions the game will have: 98
The greater the number, the closer the Hero to that faction. This numbers can increase or decrease based on the choices made in quests or actions in the world. If you reach certain amount of reputation, let's say for Nor City, you will gain access to some more quests related to Nor City, or may be access to some facitilies or shops.
May be adding more factions, like Warrior/Gladiator Guild, Merchant Guild, or anything that can enhanced the open world of AT.