That's a wild guess. For all we know Apple Maps could have been all his idea. He was responsible for MapKit which was the fundamental building block for Apple Maps. Unfortunately the final app was only half baked by the time management wanted it live. Perhaps they made him director but gave him an inexperienced team, which left him with his hands tied since he was no longer the lead programmer. We just don't know.
7/8/14 at 2:34pm