To be honest, I smell bust on Young. I'm not afraid to say it. He is 5'10" 205 (maybe) with a frame that can't put on weight, with Drew's brain, Baker May field's arm, and Kyler Murry's height.
I think you are under appreciating the newer QB rules and treatment. If Young is smart which all indicators support, then he won't take the kind of hits that formed the logic about size.
The concern about being able to see the field is valid. It has been proven by multiple QB's to be a surmountable issue.