Having been at the event, I had a brief sit down — in my opinion it’s better than the seat in the 707/717.
That said, a minor gripe I have is a lack of ‘perch’ seats (except near the front/back) and the bins look small compared to a 450/455.
GOP has: PA, Crew call, Door close, Signal buzzer, and local door switch.
(And it seems all the panels I’ve seen so far have some tape..)
Normal mode of operation is Driver Open, Driver Close — dispatch responsibility may be retained by guards ‘for degraded working’.