I think you have to take these reviews with a pinch of salt, undoubtable they may be better cars in its class, however as most people dont drive like Lweis Hamilton to the shops etc.
Depending on the AP and if the car meets the users needs I would expect a UX to be more than adequate for the vast majority of drivers.
It is intresting however that it only UX going on the sceme when most other manufacturers are pulling vehicles of it, probably Lexus trying to get rid of stock.