There might be no other defense that will have more pressure to perform at an improved level in 2020 in the Big 12 than that of the Texas football program. Texas turned over their coaching staff this offseason (and even some assistants before the Alamo Bowl), largely due to the poor play of the defense throughout much of Big 12 play and in the home loss to the LSU Tigers.
Given that the Big 12 does have a very explosive nature of offenses to it, the Texas defense does get some relief in the public eye for how bad they were statistically in some regards last season.