Two things I've found in mine. First my torque steer varies a little but it's always more noticeable when the car is running particularly well so I've come to appreciate the feeling a bit. Second I know that on feeling the tires for sharp tread edges that a side to side motion that discovers sharp edges means "toe" wear and I don't think there is any faster way to wear out a tire.....well except for smoking them. If sharp edges are felt going front to back it would indicate a "load" wear and that would be kept in check by an X pattern rotation as long as your tires are not directional. I don't think that "load" wear is very aggressive though so nothing to worry about. Cupping is discouraged I believe by rotation and balance. Of course loose parts especially tie rods, or alignments done by incompetents are always something I worry about.