When it comes to home theater, I think Yamaha has always been about keeping cost down. When Denon released their $7500 AVP and $7500 Amp, Yamaha released their $2500 AVP and $2500 Amp.
We were lucky we got a Yamaha AVP for a few years while it lasted because they usually only have AVRs. They are definitely not trying to compete with Marantz and Anthem.
So, if I were betting, I would bet Yamaha will still be keeping 11Ch as the max, which was already "PUSHING IT" for Yamaha. Their previous flagship AVR (RX-A3080) only had 9Ch.
And to keep costs down, there is no way they are getting rid of their beloved proud YPAO for anything else, especially with declining sales of AVRs.
The only 5 things I can hope for from Yamaha include 1) better aesthetics, 2) not increasing prices like everyone else, 3) continue 5YR warranty, 4) continue the 7-band manual PEQ, and 5) continue great service and support, including MusicCast. This sounds boring as heck, but that's always been like Yamaha.
Sales may be down, but the Yamaha name brand has always had a following. There will be plenty of people wanting to buy new Yamaha, especially if they have a new great-looking all-metal aesthetic.