I think the biggest problem may be the 342 gears they put in most of them. I think it puts me in a bad range at the speed limits to be in a cruise gear.
How bad did the tires hurt your fuel economy? I went from the stock 265s (31s) to 315s (34.75s) and went from 20 city/ 29 hwy to 15 city/19hwy. Big disappointment.