Personally, I really don't care what is used. Zone or man, it doesn't matter to me. Both are needed and the team needs to get the DBs to understand and be able to thrive in both.
My only problem with how things were last year was that Dallas seemed to be playing off far more than they really should have.
A lot of people pinned it on Reeves and said that Wade had him so far off because he sucked. Don't get me wrong, Reeves sucked/sucks/will probably always suck but he can only play how the coaches want.
That said, I don't expect to see the team start to press the receivers any more this year than they did last year. What I do expect is to see the DBs contest more of those passes which was something that Reeves could not do to save his life.
Playing off should not mean that you are conceding 10-12 yards whenever the offense wants it. Thats the way it was with Reeves. He simply couldn't come up and make a play and it killed the defense last year.
This year, I expect better. Be it Newman, Henry, Pacman, Jenkins, and Scandrick I expect the DBs to be able to play off and still prevent some of the underneath stuff. At the very least I expect to see some of those passes getting contested which would be a major improvement over what was happening last year.