Here's an interesting note on how the power structure will work for the Jets.
#Jets reporting structure: GM Mike Maccagnan has final say of the 53-man roster. He reports to Woody Johnson. The HC reports to Woody too— Ian Rapoport (@RapSheet) January 14, 2015
This isn't exactly a shocking development. It seems like this is the way things have been working. It surely described the Rex Ryan-John Idzik development. The parallel searches for a general manager and a head coach also indicated Woody Johnson was looking to retain a hands on-ish role in the team's operations rather than handing over football operations to one person.
While my strong preference would be for Woody to hire one person to oversee everything and then just step aside, this structure does exist with other teams in the NFL and certainly can be successful if the right combination is installed in the two jobs.