There's been a huge misconception of Cam Newton. Cam Newton's season was relatively close to his rookie year.
Rookie year- 4051 yards, 21 TDs, 17 int, 60%, 84.5 qbr, 709 rushing yards & 14 rushing TDs.
Sophomore year- 3869 yards, 19 TDs, 12 int, 57.7%, 86.2 qbr, 741 rushing yards & 8 rushing TDs.
Cam didn't hit a sophomore slump of any kind. He just got lost in all the RG3, Luck, and Wilson hype.
The only young QB (under 25) that I'd consider taking over Cam is arguably Luck. Luck seems to have his head on better but Cam seemed to make huge strides towards the end of the season. Saw less moping. And this is coming from an Eagles fan.