Here are some Madden online tips to follow to help counter these shake blitzes:
In passing situations, use slants, drags, curls and, in/out routes. Shake bliting defenses will tend to force you to pass the ball quickly so use quick routes.
Also, most shake blitzing defenses will likely send all of their linebackers. So, the middle area of the field will be vulnerable to the defense. Attack this area with your passes.
Try to avoid using a play from under center. Pass from a Gun formation. The extra ground will allow for extra time to get a pass off.
When running the ball use a power set so you have plenty of blockers against the blitz. Pinching the line should also help. If you are running to the outside, snap the ball when the linebackers start "shaking" to the opposite side.
Let the play clock run down until there's about 1-3 seconds left. This will help force your (button mashing) opponent to work a little bit harder at what they are trying to achieve.
Madden NFL 12