Yup, we won't agree on the looks, totally subjective. I do agree that more hard buttons are a more friendly, ergonomically sound means of executing functions...at least IMO. In terms of hard buttons vs utilization of the info screen, there's not much difference between the i4 & i5. In actuality the i5 made some improvements in terms of ease of use of the info screen vs the i4. Fortunately audio functions can be controlled via steering wheel controls and the iDrive controller wheel does make things better rather than forcing you to input via the screen if you choose not to.
The highway assist on the i5 is rock solid with zero nags. Driving on the LIE on Long Island, proved to be totally uneventful with no drama using highway assist, which is certainly a compliment to the feature. I was actually surprised by this. However with that said, as I've said on the Lucid forum here, I'd rather drive the car myself than let the car drive. As good as the BMW highway assist appears to be or the Lucid version might be down the road, you still need to be equally alert to any quirks just as if you were driving yourself.
As far as I'm concerned you buy these cars to drive, not to be chauffeured, but I know others may differ.