Front Suspension Wheel Bearing problems of the 2010 Subaru Outback

Our 2010 3. 6r Outback arrived in Apr. The first time that the vehicle was taken on the highway, I noticed a prominent high frequency vibration in the steering wheel. There is also unusual feedback in the steering wheel at slower speeds that feels unlike anything related to road noise. I researched the "problem" on the internet and seen that there were many forums identifying the same problem for 2010 Outbacks. I informed our local Subaru service dept. About the vibration and made an appointment. A Subaru service technician confirmed the vibration during a test drive and recommended a spin balance. After reading all the complaints and proposed "fixes" on the internet, I told them that I was not confident that a spin balance was going to be successful. I asked the service dept. Manager if they had been informed/aware of the ongoing problems and she denied having any previous knowledge of steering vibration issues with any Outbacks. The spin balance added a multitude of stick-on weights to all four wheels (some exceed 9 in. In length). The invoice said that a follow-up test drive by a technician produced normal steering as designed. A test drive home from the dealership on the highway again produced the same high frequency vibration. I informed the service dept. Immediately and the vehicle was again left there this morning. I produced several pages of complaints found on the internet identifying this issue. They made copies of them and told me that they were going to contact soa factory engineers. The bottom line is this. The vibration is prominent enough to cause fatigue and numbness in the hands on extended drives. There is also a concern of what may fail and cause a loss of steering or vehicle control. The faulty component needs to be identified and the issue fixed by soa immediately. Soa has tried a number of fixes without success (spin-balance, forced balance, alignment, backlash spring, wheel bearing, steering pump, replace out-of-round tires).