You sign a veteran to play band-aid for a few years (backup quarterbacks always seem to be floating around), then draft someone young the Patriots can groom.
That is easier said than done. There were not many viable backups floating around last off season. Let alone any viable enough to run this sight adjusted offense.
Yeah, I never once suggested that anyone would trade a pick for him straight up. I suggested packaging other picks with him. Do you think that no one would take a chance with Cassell, when all they would risk is moving down in the first round? Think about how many QB busts their have been. I think there is a much smaller risk with Cassell then there is with some unproven rookie.