How much you want to bet it want matter?
If he does not play perfect he is a bust. 4th year in the league. Will be playing against rookies and UDFA's against very vanilla defenses.
I can see the excuses already. Well Trance was not playing with the first team.
One thing to keep in mind I'd that although he will be playing against rookies and UDFAs, as you've said, he will also have rookies and UDFAs helping him execute the offense.
It's apples to apples in preseason for the most part.
He will either show that he grasps the offense and can execute or he won't.
It's not a final grade....merely just more evidence, either way