I don’t think this has anything to do with trend toward angular cars. The Cien is angular, it is also understated and tasteful. It is an incredibly well executed design.
Neither this nor the Lexus design language are particularly angular. In fact their are swoops and curves criss crossing and going in every direction. I think this has to do with an emphasis on novelty over beauty. Short term shock value over a lasting design. It reflects the larger product shift from cars that were meant to last to cars that last as long as a lease. The last time we saw this decadence in form was the advent of engineered obsolescence in the 50s. Gobs of decorative surface that had little to do with anything other than attracting the eye. I’m not an enemy of decoration, but it has to be handled tastefully and with skill to create a holistic design. The opposite is what is shown here, a fragmented mess, a pastiche of ideas.