Watching the interview with one of the devs and what he is saying is complete contradiction to what that trailer showed us. It sounds from that interview they may want to return to BF2 level of squad play which has been missing in the last 8-9 years of Battlefield. Could this be the changing of the guard in terms of goals for the Battlefield series? I certainly hope so.
My favourite line was, "We're trying to get away from 'spawn, run, die'" but from past interviews, what DICE talk about and what gets released are often very far apart. Will be interesting to see what direction this goes in.