That's a pretty good summation.
To wit:
Sark spent more time refining Quinn's mechanics. He battled in preseason last year with Card, which kind of wasted reps. This year, he supposedly was focused on being QB1 and acting like it.
The OL had a better than expected season last year considering all the true freshmen. That line returns largely intact with another year. plus seasoned backups.
The WR group is healthy. Neyor and transfer AD Mitchell are ready to pair with Worthy to run by defenses. JWhitt and Sanders return as known quantities.
The RB room is the best in the nation. If the OL is doing its thing, though, they should be running to daylight.
The defense has a lot of "should be better" units. It's less of a sure thing than the offense. However:
T'Vondre Sweatt and Alfred Collins are playing inside as "contract years". Over their Texas careers, they've shown dominant abilities, but not consistency. Both players have one more season to be "the man".
After that, it gets hand waving. The differences between the LB and DB corps and jobs are subtle. Breaking down their roles is a book in itself. New names to know: Anthony Hill - true frosh LB/Edge. Highly coveted, high skill, high motor. Obviously new.
Jalen Catalon - Transfer from Arky at Safety/DB. Suffered from shoulder injuries over career, but allegedly good to go. One of the hardest hitting Safeties in college football when he's on the field. Texas solidified pass coverage toward the end of last season. Trajectory is up, but let's see it.
I still need to see a pass rusher. A player who can get to the QB reliably will make every layer of the defense better. There's a couple of candidates, but this is not something I can confidently predict.