How can this be surprising? Top recruiters always are in demand with plenty of options. Coordinators move around. Coley is the logical age to aspire to a head coaching job in a few years. He apparently doesn't think he would get the nod here so he's looking for another resume nugget. Succeeding at a lesser SEC school would do it.
It's not true the offense was markedly worse than the defense in every category. Some aspects were actually very good, like yards per pass attempt (16th) and yards per play (9th). But when you are 104th in the nation in rushing attempts per game it coincides with lots of early down failed passes and therefore difficult third down situations, ones we did not convert with a true freshman quarterback.
As one of the articles noted, Coley hates dink and dunk. That's one thing I appreciate about him. Nothing regulates an offense like pretending that short passes are an acceptable substitute for running plays. It's all time ignorance. Granted, short passes are more of a weakness in pros than in college. Alex Smith has limited upside in the pros since he simply can't threaten a defense downfield. In college you can get away with it against weak foes but not as you move up the ladder. Smart offenses run frequently and take dagger shots downfield. That's why option teams were successful for so long, and would still be successful if elite programs ran that offense. I hope Nebraska wises up and returns to its roots.