Nope, nouveau is still hosed because they've been blocked ny Nvidia's secrutful FALCON's which have the reclocking and power management API's locked away behind proprietary firmware blobs.
They're likely changing it because security researchers pwned FALCON.
There is a way to leak the hash against which High Security mode FALCON compares the microcode for signature validation.
So hopefully you'll forgive me if I maintain my skepticism over this being anything but Nvidia iterating to close a massive security defeat by redesigning their FALCON controller to mitigate the thorough pwning that's been achieved.
I don't doubt there are other improvements, I just think the timing is pretty darn convenient, especially for being in the midst of a semiconductor shortage for going and doing a massive manufacturing change like that.