I think it was a wise move by tomlin. When your being undermined by your bosses and your supposed to be the "boss" to the players, the respect level can get away from you. I think tomlin could have been irked that he was "padding stats"
and being undercut with arians departure, that this was his statement to the rooneys that they chose him to be the head coach and that's what he plans on doing. The time for being buddy buddy with the vets is over if this team wants to compete. He did what he had to do when he took over a vet-laden team but now the guard has been changed and this team is now his.
Sucks for Hines that he's out, but he should have retired gracefully into the sunset with his milestone reached.