Silly? A player almost universally considered a first round talent that slipped because of 'character' issues, spends 2 years attached at the hip to one of the greatest QB's and coaches of all time, commits nary the slightest offense, and is praised by BB and Brady as willing to work hard and learn. So this would have been 1st round QB fixes his character issues, is mentored and instructed by the best there are in the NFL, and you think it's "silly" to believe his value may have increased significantly? That sir, is probably the silliest thing I've read on this site in a while.
Yeah, sitting and learning from the best always ruins a player - all GM's know that. Just ask them about Aaron Rodgers, or maybe Tony Romo. Wait, how about Tom Brady? Colin Kaepernick, Brett Farve, or Matt Hasselback? And those are only some recent stars. Yeah, standing around holding a clipboard is certain to devalue a quarterback. Yup, it's silly that he could become better than he was coming out of college. Silly, silly, silly!
There are many examples of great QB's who have spent time holding the clipboard before showing they can play in the nFL, but there are many many more who have held the clipboard and gone on to do absolutely nothing in the pro's. Mallett has a high degree of talent and character issues definitely weighed him down in the draft but his stock isn't going to go up significantly until he shows he can play in the NFL, which to no fault of his own hasn't happened yet. It may be that somebody like lombardi had a high grade on him and is willing to take some risk to get him but the first round pick stuff is pie in the sky wishful thinking. I think Belichick would take a 2nd for him if he can get one and feels he can fill his back-up position with a vet, but that's about as good as it will get. i don't see him trading him unless he gets a good return because he has invested too much time and effort to bring him along and he isn't going to make an even swap in draft position because that makes no sense.