Since Ross is an absentee owner, treating the Dolphins as some glamorous hobby, he needs a "figurehead" proxy owner, a face, to oversee the team. That is why some people are calling for JT or Marino, but it could even be someone like Dungy to run the ship. In essence, a committed person that the camera looks to on game days up in the box.
At this time everything about the team is fractious, Aponte, Ireland, Philbin, and the lockerroom. There's no defined direction with an owner physically not in the building the majority of months out of the year. Ross needs that extra person, or he should sell the team. Because as currently constructed, Ross' philosophy will continue to ruin this franchise, inadvertently. Everyone in the building as it stands has their own agenda.