No question: Tannehill remains starter all season and again to start 2013.
That being said, I am firmly in the belief that he is not a franchise QB. Franchise QBs make the players around them better, not the other way around. Franchise QBs throw TDs, don't throw picks and win games in the 4th quarter. RT17 has not shown us any of the above. Nothing would make me happier to be proven wrong on RT but this being the Dolphins, I'm certain that doesn't happen.
As he deserves.
He gets the entire year next year before making a decision on his future. If he doesn't show potential to be a Top quarterback we have to look at other options. But my feeling is he won't disappoint, he's too talented and smart and this coaching staff is too good to ruin his development. We just need playmakers around him and we need to fix the left side of the offensive line.