Defensive line is probably the best its ever been, talented and deep
Linebacker is experienced - 3 seniors in the 2-linebacker rotation... maybe no one as talented as David Hawthorne, Jason Phillips, Robert Henson, Daryl Washington, or Tank Carder(all NFL guys who played linebacker for the Frogs) but they are solid and experienced
Saftey position is good and experienced as well. 2 guys are legit first team all Big 12 guys
Main concern is corner. Kevin White is good but isn't the lockdown guy Jason Verrett was last year. And Ranthony Texada has played well but hasn't been tested deep this year.
Overall I say the jury is still out but after adjustments were made they stopped Oklahoma cold. And without the power running game to worry about against Baylor, TCU can cheat toward the deep pass. I like the Baylor matchup for TCU's defense much more than Oklahoma because Baylor can't attack in as many ways.
In conclusion Gary Patterson's 4-2-5 was made to stop offenses like Baylor and it has shown the past few years.