Porsche has never been one to deviate from their designs with a refresh, and were seeing that continue with the 992. The changes are extremely subtle and here's a pic of the 992 alongside 991 so you can get a sense of the slight tweaks that have been made.
I believe on the RS models have this kind of cladding and there its more of a diffusor then the plastic we're seeing here. But keep in mind that there have already been some leaked documents that suggest all of this venting is fully functional. Its not just a tack on like we see on vehicles like the CTR.
Over the years Porsche has been in the business of offering wilder styling but lucky for them the industry accepts it as long as the styling is functional. Even the Lexus LFA, as ugly as it is, has functional aero, but in the process compromised what could have been a clean design.
Standing out in all ways, not just with performance, might have influenced that decision. Fortunately darker color LFA's help to blend in the rear end.
Blue or Black are ideal but I have a soft spot for orange as seen on some nurburgring editions.