First off, I have no idea how good the Utes will be. I doubt they'll be a .500 team though. If they get better and more consistent QB play then they could be one of the better Pac-12 teams. Not better than USC, who could be special, but good.
The biggest worry I have is the OL, particularly because they're replacing both OT's and will likely be leaning on two JC transfers who won't be on campus until summer/fall.
The defense will be fine. Not perfect, but solid. They have only one returning LB (if you don't count Blechen), but the "new" guys got some experience last season. The CB's are experienced and the safety starters are good, but the position needs more depth. Star is back and he's ranked the number 1 DT on some way-to-early-to-be-ranking-2013-prospects lists. Scout/Fox has him as their number 1 pick overall. Crazy. The d-line will be very good against the run, but it remains to be seen how they handle the pass rush.
Anyway, most U fans, at least those that are being realistic (in my mind) will worry about 1) keeping a healthy, consistent QB, 2) keeping Wynn protected, and 3) getting the new offense in sync now that Brian Johnson is at the helm. He's young and talented, but he'll be up against much older, much more experienced coordinators. The offensive skill players are almost entirely returning. Every single key WR is returning and John White is back as well. Suddenly the RB spot looks deep post-spring practice as well. TE is 3 deep and they only are having to replace the FB position.
It should be a fun season. Utah did have a chance to tie USC in LA last season late in the game. USC is going to be better, but so could be the Utes. I don't think they'll win over USC, even being at home, but I will be disappointed if they're not better than last season overall as a team. The potential seems to be there.
Oh, and no Stanford or Oregon this year either. Lucky Utes!