I agree with a lot of this. I've often thought Tannehill sacked himself a lot.
http://www.sportstalkflorida.com/three-areas-tannehill-must-improve-upon
Allow Routes To Develop If Tannehill consistently get's proper depth in his drops he should have more time to allow his routes to develop. On multiple occasions last season Tannehill missed opportunities for big plays by coming off of vertical routesand throwing the checkdown too quickly. His willingness to throw the checkdown has helped him steer clear offorcing the football down the field and throwing interceptions, but at times it seemed as though theunderneath throws were predetermined.
Tannehill has the ability to make every throw on the field, but if he's unwilling to see the field, he will continue to miss opportunities that could greatly benefit his team. Dolphins new head coach Adam Gase will challenge Tannehill to see the entire field and exploit mismatches. In order for him to maximize yardage on passing downs, he must exercise patience and allow routes to develop.
http://www.sportstalkflorida.com/three-areas-tannehill-must-improve-upon