Vehicle Shudder problems of the 2007 Honda Civic Hybrid

When I am traveling at speeds above 65mph my entire car vibrates/shutters/shimmy/shakes. It is felt in the steering wheel, and shifter, and the overall ride of the vehicle. It only occurs when I press the gas to accelerate. If I am traveling at 72mph and I release my foot from the gas the vibration does not go away 100%, but it's greatly reduced. At 32,000 my tires were completely bald and worn. I brought my car to Honda who would not honor the warranty which expired at 30,000. I then took my car to a repair mechanic who told me the he could not fix the camber which was out of alignment. It was the cause of the excessive tire wear and so I bought new tires and had them mounted, aligned and balanced. Recently after having a 50,000 major service performed on my car by Honda the problem came back. Had the right and left inner cv joints replaced and the vibration still persists.