In regards to the "UGLY", I also have experienced the wheel hop and bump steer you mention with our 2018 X1. Living and driving in Northeast Ohio with miserable roads, My X1 will also, while hitting bumps at highway speed on curves, will regularly slide across the lane and to the outside of the turn. Also no issues with bumps while going straight. Also have experienced a bit more hydroplane in wet weather with this vehicle.
I have gone from Pirelli P7 to Goodyear Eagle Sport, both in a Run Flats. Made no difference in the handling concerning the bumps on curves at highway speed. Possibly a non-Run Flat may make a difference.
