They had one map running, all classes and vehicles were ingame and running. The map was pretty big, and the gameplay flowed very well. The two times i played it was as Strogg, so i can only give that side.
Our mission goals were: Hold off the enemy for 20 mins by, 1. Keep the enemy from constructing a bridge, 2.Stop them from moving a big truck (forgot the name) through a tunnel and to one of our areas. 3. Keep them from hacking our shields (?) 4. And stop them from blowing up our containment area.
The battle flowed very well, if you died, you can spawn right where the action is. So you wont have to run all the way from the Strogg base if they are still working on the bridge. No flag taking or anything like that.
Each class gives the game an almost RPG feel, and with the complexity of each class, I feel it will be difficult to master them all. (I see that as a good thing).
Both times I played the Strogg defence held and we won…but i say the other team win while i was in line to play…I think they have done very well in game balance (from what i can tell).
Sorry I forgot the names of stuff, and sorry this is not better, but i hope it gives you an idea of the gameplay.