The arm strength is definitely where i would see the biggest problem, also game managers and checkdown artist. I think anyone that doesn't have a playmaking mentality would have trouble due to the lack of downs. 3-4 yards just aint gonna cut it. Cassel & Sanchez would be my first 2 examples as well. A guy like Ponder too who barely cracks double digit passing yards and has a bit of a noodle arm.
Now Tebow has a cannon, but I think his running talents would be wasted. He is next to unstoppable though when teams back off, the bigger field and the gained seperation of recievers could be a lethal combo.
On Rex Ryan, I don't think he looks for the spotlight. He embraces it a bit, but every HC, hell every athlete needs a certain swagger. Every team has preseason fights (Pats are famous for em) and players that step outta line, coaches say dumb stuff or make bold statements. The Jets just get hammered with it when they do though. The Giants are pretty much left alone, Carolina player guarantees a SB and it gets a brief footnote, Cromartie promises a win vs the Phins and its the NFL headline for a week. He certainly knows his x's n o's, still not sure about him as a HC. Don't like his clinging to Sanchez even though he has a clear better option.