Do players who play in domes get demerits for playing in such? In addition to Ryan, there's Peyton (just about all his career) and Drew Brees. Like I said I think Ryan could adjust pretty well based on what he did at BC.
Demerits from who? To me it is just a logical part of the entire evaluation. You evaluate the conditions, the scheme, the teammates, the opposition... the physical talent, the decision making, the footwork, etc. etc.