Tanner had guys open on just about every play. As was stated on the int in the end zone he had a receiver wide open on the intermediate round that would have gained plenty of yards, but he made the wrong read.
Robert certainly had a play call here and there that was not a great one, but this argument could be made watching any football game at any time. But most of the time, if Tanner gets through is progressions and throws his passes "on-time" BYU would have scored at least 20 more points.
Is Tanner not going through is read progressions fast enough an execution problem or is it an individual performance problem?