I thought that was what they were doing with Weaver.
Baltimore would not have made him 'Assistant Head Coach' unless they thought he had a bright future within the organization.
I don't know whether Jerod Mayo is going to work out, but he was only the DC for a single season.
Bill Parcells was the linebackers coach in New York and like Mayo held the DC job for a short time.
One thing I will say is that people criticize Aaron Glenn or other coordinators for not putting up 49ers or Ravens stats on defense.
If you look at the defensive backs he was fielding each week thanks to the front office, it's no mystery why Stafford threw for 367 yards, Mayfield 350, etc. in the playoffs.
Detroit to win the Super Bowl is going to have to revamp their entire secondary. Branch is perhaps the one player with upside as a starter coming in as a rookie.
But CJ Gardner Johnson? He was a veteran free agent move that turned out to be a bust move. Nothing but careless penalties and blown assignments.
So, Glenn is only capable of showing what he can do to the degree he has the talent on hand to run his scheme.
With better talent he could do a lot better.