Capologist vs. Personnel Guy
Everyone - media and many fans - jumped to the assumption that the Jets needed to and would hire a 'personnel guy' rather than 'another' capologist like Tanny. The Jets roster last year was awful so the thought was a better personnel guy was needed at GM to fix the problem.
But even though Tanny was supposedly a 'capologist', the cap situation is a much bigger mess to untangle than the roster per se. Tanny was bad at evaluating personnel, but he was even worse at what his supposed strength was and he left the cap situation in a horrible mess.
It's arguable that ability to manage contracts and the cap is even more important than the ability to evaluate personnel. If the Jets had selected someone who (supposedly) excels at personnel - and how do you even know how someone is good at that - how would they get out of their current situation? There are probably a lot of good personnel evaluators out there who wouldn't make a good GM, but a GM can rely on. A good GM has to manage the roster financially, keep it stocked with depth within the financial constraints. I think that was the model that the Tanny regime was built on - a capologist who would rely on personnel scouts. Only he wasn't good at either - he rejected good personnel suggestions and was awful, just hideous, at contracts. Which doesn't mean that the Jets should boomerang to a personnel expert at the expense of a good capologist. And, Idzik seems to better ("by far" LOL) at both than Tanny ever was.