The big issue is that Texas has decent answers at both Guard and Center spots. Derek Kerstetter played RT reasonably well last season. He's graduated now, so essentially both Tackle spots are open.
Unfortunately, Tackle is the advanced level spot. If Andrej Karic spends the offseason working with the trainers, he's likely strong enough to challenge for RT. He's not ideal since he's not as tall or has the reach you'd like, but I believe a nasty disposition (that he has plenty of) overcomes minor physical statistics.
Which brings us to LT. That's almost certainly the jewel of the OL. It's a right handed QB's blind side. It's the pull and pin guy. The NFL pays LTs like they pay QBs. This guy can't fail. Last year, Christian Jones, who has every measurable you'd want, failed a lot. Some weren't his fault (TEs and RBs have to help in protection schemes), but too many times he wasn't fundamentally sound on his technique or assignment.
Like I said, not much can be taught to better techniques in-season (time needs to be devoted to game prep for the upcoming opponent). Texas' best hope is that he's an apt pupil, because I know Kyle Flood can show him what he needs. If Jones can be a reliable LT, the Texas OL can be one of the best.
Going from matching against 17 year old high school DEs to taking on 22 year old collegiate defenders just isn't reasonable. True freshman OL need time to strengthen and learn in a college system almost exclusively. There are a couple of newbies in this season's class that could see time at a Guard spot or possibly RT in a late game against a weaker opponent. It's hard to imagine a scenario in which Flood deliberately plays a true freshman at LT unless there's no one else available.
Texas recruited a premiere OL class. However, it's not realistic to expect any of them to help at the trouble spots next season.