How is he better in Dallas than Washington?
Gruden runs a good deal of timing based passing, so does Linehan. To me, if he was a bad fit in Washington, that carries over to Dallas.
Two completely different offensive schemes.
The WCO is completely based on the footwork of the QB. If you have a 5-step drop in a WCO it may look like this:
3 medium strides, a studder step and then a big stride.
And when the back foot hits the ground on the 5th step, the QB has to look at the primary receiver, then the next receiver, then the next, then the checkdown.
If the QB takes 4 medium strides and then a big stride...the timing of the play with the receiver is completely thrown off.
That's why WCO coaches often end up loving the QB with lesser ability like Kirk Cousins, Jim Miller, Doug Pederson, etc. The WCO is more like Bob Knight's motion offense in basketball. The plays are designed specifically so somebody gets open and you can have lesser talented athletes and still score a lot of points if they execute the play as designed.
The Zampese passing offense is more like the basketball coach without any real set plays...it's more about understanding defensive concepts and improvising based off that. Linebacker sits down in a certain area and the receiver reads that and sits down in another area.
For some reason, WCO coaches like to try and take running QB's and fit them into their system. Atlanta did that with Vick, but he was far more effective in Dan Reeves' Zampese based system because it's not so footwork dependent.
The problem I have with RG3 is that he can't see over his linemen and he doesn't have the footwork of a Romo or a Brees to find those passing lanes and fire the ball. He could work in read option style offense, but can't take the pounding. Therefore, I'm skeptical he will ever work in the NFL.
YR