Good to see a new preamp in the works.
I would suggest changing the volume indicator LED color to green, just so everything else matches. An internal jumper to toggle between blue and green LEDs would be nice. Overall, very nice to see thet addition of a volume indication; it's very similar to what Audio Research did.
Also, I would suggest dropping the display. I recently had a piece of gear (~ $2,500 USD) from another high-end manufacture, and the display did not age well. When your scrolled through the inputs, there were variations in brightness, that ranged between entire letters to some random pixels if that makes sense. Maybe bring over the LEDs from the BDA2 and 3 to indicate lock, sample rate, etc.? With that said, there would be even more lights on the front, so it's good to see there's a dimming option. Adding the ability to have the unit go totally dark expect for the power LED would be great. I have always liked the minimal lighting on my Bryston gear - the BDP series needs a display so that's okay.
Lastly, I agree that the headphone jack would be better minus the ring.