No offensive scheme in CFB works on the "left and right tackles leak defenders like raw sewage" philosophy.
Texas' OL repeatedly, both this bowl game and all season, allowed pedestrian DL players to scream in from both sides. Without a competent TE, it was impossible to set an edge. Without an edge, no outside runs or sweeps would work.
Without time to develop a route, outside receivers couldn't use double moves to shake defenders. Speedy (but small) slot receives like Devin Duvernay couldn't ply their trade. All those things take time to develop, and the Texas OL just wouldn't allow it. It reduced the offense to inside draws, counters, and smashes along with straight slants or flies to the receivers. Occasionally, a rollout would be attempted just to move the launch point, but risked rolling into a defensive overload.
Texas lost their most indispensable player (Connor Williams) almost immediately. They lost their top TE before the season. The already rickety OL depth more than evaporated with the losses of Elijah Rodriguez and Patrick Hudson. Without even basic OL play (which seemed to change configurations 3x per game), no one could really get a read on the talent the actual ball handlers possess.
The injury excuse is(was) real, but is still an excuse. It's popular to bash Tim Beck (the OC), and a lot of it is deserved, but no one can put together a game plan under those constraints.
No one can plan to overcome that many position specific injuries, and the law of averages says that won't happen again. However, Texas will be different next season only in as much as that OL can be different.