Fortresses, Outposts, and the "Camps"
So we got the regular outpost right? In Far Cry 4 there was a big brother version of the outpost which was the fortress. So maybe add enemy camps. Enemy camps would work the same as outposts in Far Cry 2; they're marked on the map, you can kill people in them, but you can't officially take them over. Of course there would be a smaller amount of these camps, but they would be a nice little feature.
Something Similar that I'd rather see...
I think I'd rather see a game mechanic where the enemy could come back to retake outposts that you've secured.
I know FC4 tried to do something similar to this, but it was just a raid, and you could never actually lose the outpost.
Imagine if similar to FC4, the raid took place, and you decided not to go to help, if you'd later have to re-take the outpost.
On top of that, with collected resources in the game you could "fortify" the outposts (or I guess towns in FC5) to rebuff any enemy raid.
You could selectively fortify the towns closest to enemy territory, but raids should be slightly random, sometimes striking a little deeper into your territory.
The more fortifications you place (including having some of your allies base there for added support) in a town, the better its chances are of fighting off the raid.
If the town is still retaken, then you have to re-take it against your own new fortifications... making you have to use new tactics the next time round.
For me, taking out the outposts is the most enjoyable part of the FC series. And I often found myself a little sad when I'd drive past an outpost I already took, because there weren't any badguys there. With a mechanic like this, hours of game play would be added to the game, and it would add a strategic element to the game over and above how to sneak in and stay alive.
Like, if an outpost you take is near an enemy airfield, you can add some sort of anti-air weaponry (buy rocket launchers for the people) because the chance is greater of a raid including some air-power. Better fencing around the outpost would prevent enemy infantry from getting in as easy, but enemy vehicles could plow though it... so it wouldn't be as good of a defense for a town near a major supply line road. It could be like a mini tower defense game, except that you don't have to be there, and if you lose, your own defenses will be waiting there against you.
Then, the game would have to add some enemy raid parties that move across the map in real time, so that you could ambush while they're on their way. And so that you can get a sense of what type of enemy force patrols which areas.
I don't know, but the possibilities are endless. But the most important part would be that it shouldn't take away much time at all from the game... besides the gathering of supplies, which you already do.
Any thoughts?