Hopefully they bring him back annually to give a primer to whoever replaces him on how to read defenses and how to react....
One story from Patriots Reign by Michael Holley. In early 2001, in the weight room, Brady was educating the defensive players on what a QB looks at when he comes to the line. A new free agent asked, "who was that guy" and when told it was the backup QB, was shocked because of his knowledge.
Second thing which is why I hope they bring him back is unrelated, sort of. Mayock and Ron Jaworski used to do an Xs and Os show on ESPN, early on Sunday mornings. Sometimes they would meet with QBs or players and talk about it. One QB ( unnamed for obvious reasons) said that after meeting with Jaworski for 30 minutes, he learned more than he had from his 3 quarterback coaches in the NFL, and the guy was supposedly a 5 year veteran....