Brolic Gaoler
formerly Alienshogun
Okay, this is how I think Dominion works:
3 bases neutral at the start.
Walk into a base, hold X at the terminal while the bar fills. You cannot move/fire while doing this.
Once the bar is full: "Capture Initiated". This base is not yours quite yet. A 15-second timer starts, when that completes: "Base Captured". If it was a neutral/Level 1 base, your team gets 10 points for the capture. (You don't get points for capturing enemy bases.)
A 45-second timer now starts for your new base. This isn't a global timer - each base has its own. At the end of that timer, it upgrades to Level 2 and your team gets 20 points. This repeats every 45 seconds, e.g. you get 30 points for upgrading to level 3.
You can pause an enemy base's 45-second upgrade timer by holding X at a terminal inside. If you manage to fill the short progress bar, you completely cancel that 45-second timer and get a 15-second timer of your own for a base capture - which an enemy can likewise pause/interrupt by killing you and holding X at his terminal. He doesn't have to wait an extra 15 seconds to retain the base, but it does restart his upgrade timer to 45 seconds.
The UI really shines here, it seems very clear which base is about to be fortified, which is about to be captured, etc. Lots of timers and progress bars for quick info. Friendly bases are circles, enemy bases are diamonds. The icon color matches your team color.
Capturing an enemy Level 2 base doesn't give you a Level 1 base - you get it at Level 2 and will get 30 points if you manage to hold it for the 45 seconds needed to get it to Level 3. As each base levels up, it grants new options to its owner - holograms indicate vehicles that can be requested, weapons, etc. Shield doors eventually make the base harder to take by closing off some (but not all) entrances. These can be melee'd for access. (Not completely sure how that works.)
Ellis, Frank, correct me if I'm wrong.
That seems correct from the little we saw.
I really think if a base is recaptured it should reset back to level 1 though.