Yamaha should have no trouble designing/building class D amps, they should do it, its time to be the leader.
1000 W is a tall order, I would be happy to see 200 W 8 ohm, 350 W 4 ohm, but 500 W 4 ohm dynamic output, THD+N of 0.01% is good order at the speakers out, but better be no more than 0.001% at preamp output 2 Vrm.
On top of your wish list, please add mine, that is, expand the use of PEQ with YPAO to at least 10 bands, and also add Dirac as a paid option like Masimo's. The more manufacturers support Dirac, the cheaper the licensing fees would become.
If they do that, I believe we would soon see the mainstay will eventually include only D+M, Y, S, okay may be O+I too, the rest, such as Arcam, NAD, Anthem (unless they smarten up by working harder on their potentially viable AARC), can go back to their two channel and/or so called Audiophile domain.