Unless a kid is a legit difference-maker I can't see burning a shirt just so a kid can play ST's and get a shade of garbage-time in. ST's don't gain you much in terms of valuable experience.
I think BC had somewhat of a "screw-it, I can always recruit more" attitude towards burning shirts.
On O I think everyone but Baker(assuming he stays on O) probably shirts. We have a logjam at rb. Too many young wr's in need of reps. We got a couple JUCO's on that side to help-out so I don't know if any other true-frosh will play.
On D it is hard to say since we don't really know what we have. Compton is likely, then maybe guys like Whitmore or Dennard. Hard to say on the others, seem like a fair amount would be served with a year in the weightroom first.