It's the only real way to truly see who the best man for the job is. These coaches will get to see each QB thrown into the same scenario and the best man will prove he is the best.
These are the kinds of issues that get raised when the competition for positions, for the past 7 years, has been questionable. IMO every position on the team should be wide open. It's not Tommy's to lose....it's there for anyone to earn. The way it should be....finally.