Problem is, those mistakes need to become rare. Decision making in the red zone is a must. Growth. He's not a rookie anymore. Demand and expect more, you know like how people demand and expect more from Wallace.
Ryan Tannehill was flat out excellent in the red zone in 2013. Like you, I am concerned about his performance in the dress rehearsal preseason game. However, based on the sixteen game body of work I have of Tannehill working in the red zone in 2013 in games that counted, I am confident that he can get it done there.
And yes, I used the word excellent. Ryan Tannehill was excellent in the red zone in 2013.