It's a little disappointing in this way, as you can't just jump into some action with friends regardless of their campaign status. (newgamenetwork.com)
There's a lot to get used to so it might be worth taking a look at the screenshots before jumping into the action. (heavy.com)
For instance, it will jump into action if a phone rings in the bedroom when you are watching TV in the living room. (scientificamerican.com)