He was decent... I'm not convinced the injury took him from average to crap as much as lack of ability to adapt and grow did once teams had tape of him in this offense, but I suppose he could be great.
Another year of him as starter for all 16 I'd be surprised though
Some of us Vikes fans wish we still had Teddy. Some fans love guys that put up glowing stats. I like QBs that help their teams win. Teddy does not put up big stats but when he plays he wins. I would love to have him back. However, I would not pay Teddy more than $20 million/year.