This looks like it will be a pretty compelling product with flexibility that will be appreciated by many. I personally would have zero interest in the Pi unless its software is automonous from whatever crazed animal the main software will be so that the user can choose Volumio or whatever flavour of player they fancy. And if the Pi would be able pass native DSD... Lol.
This will seem nit-picky at best, but I personally view the LEDs around the volume control as 80's boom box cheese. I love the industrial no-nonsence look of Bryston gear. This, in my opinion, spoils that look.
I second the notion of the various LEDs being in two rows, not some offset into a third level.
Regarding HT bypass I can say the best implementation of this I've seen on a competitors P6 product is where their preamp defaulted to bypass mode when turned off. So the unit does not even have to be turned on for bypass to work. Of course if it was turned on then you had to select the HT Bypass input. This seems super smart to me. To be fair this was only when using the single ended input/outputs, not the balanced ones.
I think this will be another excellent Bryston product!