Interesting bits I find on Chinese websites, 2018 LS and 2021 LS both with instrumented tests (acceleration, braking, moose test, fuel economy, noise decibel). The pre-refresh model included its test in the following time stamp (15:45 - 17:23).
https://www.dongchedi.com/video/6833342885442617870
https://www.dongchedi.com/video/7062721888400704039
I want to specifically point out the moose test because this gives us a much clearer picture on how much the suspension tune has changed between pre-refresh and refreshed model.
The 2018 model, has much smoother transition between the cones with only a slight bit of body roll. It has some sporty nature of suspension tunes like the Germans which is plausible except, people from the previous LS complained the ride being too harsh. Perhaps the folks at Lexus panicked so they decided to return to the origin nature of the LS and instead went with the other extreme. The ride definitely soften up a lot on the facelifted model but as you can see, it now sacrifices its dynamic way too much for a much plusher ride. Its struggle of weight transfer between cones can clearly be felt, the rolls have become much bigger and you can even see how there are way too many suspension rebounds and body control fares a lot worse. To me it looks like they haven't quite found the balance where both handling and comfort are maintained as such like segment leader. Hopefully they will get to address many of its problem in the next major redesign.