Injuries on both lines, especially the O-line, make it difficult to tell what "studs" or "starters" are returning.

I don't think anyone would argue that having the starting QB, most starting receivers in a stud-filled receiving room, all LBs, all starting RBs, and many/most starters in the defensive secondary back is a very positive sign, in combination with even "normal" returning production on the O and D lines, which I think BYU has.