Is it though?
If TAMU has really become the "it" program, the destination job that it sees itself as, then Sumlin is replicable if he decides to go to the NFL. TAMU could feel comfortable in their ability to hire say, Franklin from Vandy (a Texas guy), or Dantoio from MSU (also a Texas guy), or another top flight coach.
If they aren't comfortable in that, then they're making a huge risk on a guy who is still kinda unproven, give how difficult their schedule is going to be, and the problems they have on defense. I don't like that contract.
But hey, it could be worse! They could be Texas, who couldn't have managed the Mack Brown situation any worse if they tried. The only guy that looks worse from all of this is Chip Brown and OrangeBloods. WHOOPS