Problem with Sam is he violates Herman's no-turnover-thinking-making TD's edict. He is a critical situation turnover machine whose non-thinking served him well in high school, but not so much on the field in 2017. Every QB since Colt has had trouble in the TD area so that part of the equation is probably a wash. Unless Rising shows something really special during the remainder of Spring through the start of Fall practice, Herman might not have a clear number 1. This would mean he will run out Sam with the shortest of shortest leash.
Of course, who is QB is only one part of the equation. The OL will be better, but how much better? The play calling will be worked out even if it falls to Herman. However, the receiver issues have to be corrected if any of the QB's are to succeed. The TE's have to stay on the field, and the wideouts have to learn their position and CATCH the damn ball.