Thanks for the link.
There are some similarities in objectives between the concepts, although the idea in the other thread seems to be about a tooled up firepower team, whereas I am seeing it as a stealth-based game, so primarily using silenced weapons. Have a backup loud weapon if necessary but primarily silenced.
Copehill Down seems to have been designed this way, and it is, I feel, easier to complete the map using silenced weapons. The way the spawning system is set up favours a stealth approach.
Incidentally, the squad system idea suggested in the other thread is pretty much the same as another game mode/variant I'd been thinking of and it's an interesting idea. However, it wouldn't work for a stealth commando game as bots can't stealth.
The way I see this game working is having at least three or four missions a map, possibly more. Maybe even something to do in every base on the map.
Here are some ideas then. So each map, combinations of these things:
1) Capturing/killing VIP/warlord/general
2) Capturing and returning "home" a "golden" briefcase
3) Freeing prisoners from a building. Vigil Island already has a prison building (can't think of any others).
Maybe, once released, prisoners function as unarmed squad members so they'd follow you around and you have to escort them to safety. If there were several players, the squad size function could be used to, say, have one guy go with the prisoners while the others set squad size to 0 and focus on fighting off the enemy.
4) Freeing prisoners from a prison transport truck
5) Blow up a ship/stealing a ship
6) Capturing a vehicle (like a comms truck/comms tank/cargo truck) and driving it "home" somewhere
7) Blowing up a vehicle (like a comms truck/comms tank/cargo truck). This could be a stationary vehicle, or the vehicle could be programmed to drive around in a loop and needs to be intercepted
8) Blowing radio towers
9) Blowing up some other uber-feature. For example, it would be great if the antenna on top of the TV station could be made to be an explodable objective, maybe with a high HP requiring at least a couple of C4s. There might be other features, like a bridge. Hell, what about the ship in the south of Bootleg Islands?!

10) Blow up a series of cargo crates/weapons cache. Maybe three to five piles of cargo crates on a map that need to be blown up. Maybe there could be several locations where they might be at random each game.
11) Escort a convoy.
12) Intercept a convoy
It could be some cargo trucks escorted by tanks/APCs and you'd have to blow the cargo trucks. Maybe a VIP in an urbal, too.
This might be interesting using the Copehill Down map, where you have to intercept it on the main East-West road. It would be fun having tanks in the village of this map since they don't appear on it in the regular game.
From the other thread you could add:
- Combat Search and Rescue of a downed pilot
- steal map (although this may be the same brief as the capture the "golden briefcase" mission, pun intended)
- destroy out-of-commission tanks that are being repaired.
- lay a minefield
- deliver a vehicle with arms to some resistance fighters