The question of whether Hayward or Tatum plays the 4 is really only an issue on the defensive end. Both of those guys will shred just about any big that tries to guard them. There are few teams that have two bigs with enough offensive talent talent that this will be much of a problem. In those few games, CBS may decide to start Baynes and play more mulitple big lineups, but against most teams there will be no problem going with Irving, Brown, Tatum, Hayward, and Horford. The rebounding might be a problem, but we have seen that does not overly concern Brad and Danny.