I think there are some great advantages that could be gained by moving the next F150 to a semi-unibody platform. The cab and front end would be entirely unibody construction to increase mpg's, torsional stiffness, and reduce NVH. A frame then could be attached to the back of the cab and under the rear section of the cab to support the rearend and bed assembly that would have a more traditional construction. Goal should be max fuel economy and comfort. Keep a 8,500 pound towing rating and get mpg's up to 30 to 32 unloaded.