It's the traditional Battlefield deal I think. If you're playing on public in a public squad, teamwork will be hit-and-miss. As always though, the maps are designed to encourage teamwork across the team, with positions for snipers to provide cover for team mates advancing on points, tanks to protect infantry and to destroy cover being used by enemy infantry, cavalry to distract and slaughter enemy infantry, bombers and CAS to soften up targets and fighters to keep the sky clear for them.
It's a classic Battlefield game that feels, at least at the moment, a lot closer in execution to its older siblings, but with interesting new features like dynamic battlefields that get deformed by explosions creating foxholes and, supposedly, trench warfare. It's a shame the latter hasn't been demonstrated in the Beta, but maybe it still needs a bit more time in the oven. I agree that obviously the reveal of the rest of the maps can make or break the game.
Pretty sure they said there would be. There's a button in the client for the campaign
Also, that vid is pretty damn cool