At the moment, town control is mainly a TDM with a small reward, though the militia (that so much guys want to remove, because they only see the TDM aspect) add a bit of something else and allow winners to actually stay in the town. Though, I do think that few things should be added, to make this feature more interesting (as domination mode and new crafting locations will probably take it's place as the main battlegrounds), and it would allow to make a real difference when different gangs own a town. Some of these suggestion have been made before, but remind to dev they have been made can't be bad.
RadiosIn Redding (and in BH as well), a GM spawned many radio on same channel at unreachable places everywhere in the town, which allow to spread informations and propaganda. I think it's a very good idea, and all TC towns should have those radios, automatically set on the channel of the faction controlling the town.
Second thing : militia should alert on this radio when attacked (more exactly : when one militia is killed, or radio will be spamed by bluesuits punching it). A message like « Badguy 657 is attacking the town ! » would appear, alerting everyone of who is attacking.
LawsMilitans are now close to mindless mercenaries, that attack only when attacked or when a member of faction owning the town attack (they should also protect the friends of the faction). But the members of controlling factions should be able to decide which laws are applied in the town by the militia, through dialogs with the mayor. Those laws would be :
Visible weapons allowed (or not)
Killing allowed (or not)
Stealing allowed (or not)
There could be also an option to make people pay a certain amount of money (decided by gang, for example 1000 caps per hour) to be protected by the militians (only if they are attacked of course, and not against member of the faction, so it's up to the wastelander to decide if they can trust them or not).
BillboardEach TC town should have a billboard at the entrance, with written the gang controlling the city, the laws currently on, and a custom message written by owners of the town.
MilitiaFirst, it shouldn't be possible to add mercenaries to militia, because it allow too much abusing tactics.
Second, they should loot the bodies of people they kill (only those they kill themselves), half would go in TC locker, the other half in the merchants of the town stocks, decided randomly (because if you kill someone using militia, militia will claim payment).
CaravansFinally, to create interactions between towns, you could, each IRL day, decide by talking to the mayor to send a caravan of resources (gold in redding, uranium in BH...) to another town, sacrificing a part of your income to increase the income of this other town (the boost being bigger than the malus). It would be fixed commercial routes :