First off, I think it sucks losing Elko. The defense impressed this year, and I know he was a big part of that turnaround. I hate the Aggies, but if he's going to make 2.5M, I can't fault the man for setting up his family like that.
Second, his leaving and timing of departure suck for recruiting and could hurt the 2018 class in ways I don't really want to get wrapped up in right now. We'll need another dog on the recruiting trail for sure.
BUT
Of all the defensive position groups, safeties looked the worst and didn't seem to progress much during camp and the season. IIRC, that was Elko's group to mold. DLine and LB made strides, and even the corners flashed, but almost no production from the safeties.
Also, after the BVG fiasco years, is there a chance that what we saw in 2017 was a return to "normal" rather than a DC dragging guys to greatness? Hard to say after 1 year. Would have loved to see year 2, but no dice.
Just a couple thoughts I'm entertaining to avoid going down the road of "we're completely fucked".