Imagine that Tesla did significant testing before spec'ing new brake rotors. Maybe these are better, cheaper, more availability, lighter, easier to install, etc. but I have seen no proof that they are less effective. Most all racers will upgrade stock brakes for higher performance ones, but for the 99%, these new brakes should provide solid performance on the street.
Not sure why some will rejoice in playing "gotcha" reporting, but there are many that seem to get happiness about reporting the shortcomings of Tesla products.
Tesla has the competitive advantage of offering regenerative braking vs. ICE offerings. For the average buyer, they will be good enough. For the enthusiast they will never be good enough.
As others have stated, the latest editions are being offered at up to $13,000 discounts over last years production. Some would be more excited about this than the brand name on the caliper.