Romo was only involved in game planning after 2013, when he got the new contract. This was forced by Jerry on Jason, who didn't want him there. His first season when Ginger was taken totally away from the offense, his numbers in terms of TDs, INT and YPA are up there with Matt Ryan this year, though Ryan's YPA are above 9 now.
Jerry was gushing in the off-season about the Linehan-Romo relationship that year, while most were totally oblivious to it.
So the fact Romo wasn't a leader was because of the HC, who had held this team back for years.