That is true, good call. I don't follow that area, so thanks for the clarification.
Jorgensen is going on a mission. He has played on Special teams this year and in some games and he probably could crack the two deep were he to stay. As for Bills/Alisa, I think they will have a very hard time seeing play time behind guys like Nixon, Bauman, Doman, Hooks, Nelson, Wagner, Moala, Clawson (last two are expected to be here in January and would have 8 months more than the freshman to get up to speed.)
Manumaleuna and Dulan (he started at BYU last year at age 17) are headed out on missions. Covey, Ashworth, Hafoka (6'1, 200 when he got back from his mission, says he is just as fast as when he left) Browns (2 OL), some defensive players are back.
I would guess that most of the incoming freshman will redshirt, there are no major gaps to fill (which is a very good thing.) The only freshman from this year who definitely aren't leaving on missions are JJ DiLuigi, G Pittman, Brannon Brooks and probably Jordan Pendleton. (could be more, but the first three arent LDS and Pendleton has often said he isn't planning on going.)