I'm not saying they are going to get more playing time than Gregory or Gallimore. I think their playing time is specific to a role, particularly in the pseudo-3-4 defense. I think both were drafted with those roles in mind, but Dallas also believes Osa can play 3-tech in the 4-3.
Gallimore and Gregory should both play 60 percent of the snaps or more since both will be out there on most nickel snaps. Bohanna will be out there about 30 percent of the time, depending on how the run defense does. Odighizuwa's snaps in the nickel will depend on what he shows.
I think early in the season, there's a better chance of Gallimore and Hill/Watkins being out there as the 4-3 DTs than Odighizuwa, but ideally, Osa would push Watkins/Hill to the sideline as the season progresses.
I do think Gregory will get some snaps in the 3-4 fronts in the role that Lawrence plays because I don't think we want to have Lawrence out there on all the early downs and not have him available on the passing downs because he's tired. I also expect to see Basham, who's a good run defender, out there some in that DPR/LEO role. (Maybe Golston, too, but we might see him as a small 3-4 end, and I think his primary role will be as an inside rusher.)
Starting is such a loose term with the players who will be out there in the 3-4 fronts because that group might be out there the least, if they are doing a good job of stopping the run. A player like Urban, for instance, also falls into that category, because we don't want him out there in pass defense.