LKA should not be compared to Tesla's EAD. The lane keep assist systems just assist you, they don't drive the highway for you. They all bounce around because that's how they work. They sense a line on the right, they steer left and then the same thing on the other side.
Supercruise would be a better comparison.
Well LKA on the eniro I quoted did not bounce in the lane for me and was perfectly able to drive most of the journey on motorways and country roads, it was smooth. The Tesla is smooth but it just tries to do more but cant quite get it right yet.