It is a very interesting comparison.
Yep, UT fired their defensive coordinator a month into the season -- after the loss to Ole Miss. At that point, nearly everyone in Austin wanted Mack Brown gone (and Nick Saban hired). It was actually much more lopsided than the feelings toward Bo. So, the Horns Hired Greg Robinson, who was their defensive coordinator the middle of last decade, and dumped the coach who started the season in that position. And then -- another interesting parallel -- UT loses their starting QB (Ash) to injury (he may be out for the season). They bring in the backup -- Case McCoy (who is nowhere near as good as his brother), and McCoy has been a major spark.
From that point forward, UT hasn't lost. In fact, they've played very well. Now 4-0 in the Big 12 and tied for first with Baylor. Wins over K-State, OU, and TCU -- and decisive wins. To teams that Brown always struggles with. K-State -- even bad K-State teams -- have always owned Mack. Stoops had been destroying UT in recent seasons. TCU came into Austin last season -- and won. Now, just last Saturday, the Horns pound TCU 30-7 -- with defense -- and a willingness to play to their strength on offense -- running the ball. 71 offensive plays for Texas. 52 were runs.
Texas most certainly made multiple adjustments mid-season, and it's paid off.