Front Suspension Coil Spring problems of the 2008 Ford F-250

'08 Ford f250. Severe front end shimmy. Ford said that this is related to tire pressure. Ii have owned 5 f250's and did not experience this until Ford went to coil spring/trailing arm front suspension. Tire pressure on a truck is relative to the load carried. My dealer just quoted the company line and did nothing. The company did send out a notice concerning the problem, so obviously they are aware of it. I believe this is a design flaw that warrants your attention. The various forums on line with Ford truck owners cites this again and again. When the shimmy happens it is difficult to control the truck, particularly in a curve. If I put company recommended pressure of 80psi in my tires in an empty truck, it would be a safety hazard related to traction and also greatly reduce tire mileage. It appears to me that Ford changed the front suspension design with no long term research and development and therefore is marketing a unsafe and defective product. I respectively request you look into this matter and anything you can do will be sincerely appreciated.