So your entire post was to demonstrate that a QB taken 10th should have QB's drafted at the end of the 1st round in his data set instead of QB's drafted at 9, 8, or 7.
Well, I disagree with the usefulness of those numbers.
Then we have to go to your decision to make the success rate based on hitting on a franchise QB. That can be subjective and you really need to show your work as to what you think a successful outcome would be.
I like what you are trying to do here but in order for it to be accepted more work needs to be done.