This is a testament to the job that Diaz has done at Mississippi State: He's been poached to fill Boom MF'er's shoes at Texas. I know it didn't pan out with the dual DC at LSU, but the job he did converting State's stout 4-3 into an active, run-hellish 3-4 over two short seasons was fantastic. I dare say he'll have a bit more talent to work witj (undersized though it usually is in Austin).
For us, it's helpful obviously: The last thing we need is another good-very good Western foe, and a coordinator swap always sets you back a year on D. On the national front, if Diaz takes the 3-4 with him, I'd think it become problematic. Now, you have Texas and Oregon (as well as UGA, and likely UF) all going for the mammoth DT/rangy Jack LBs for an elite 3-4 scheme. Just my .2