THE REMAINING RESERVATIONS at each seating are what will be offered to coach - which may just be a few in total. In 2018 non-sleeper passengers using the dining car used a MENU THAT WAS PRICED.The specifics of letting coach passengers in the diner will be telling if they are serious or not about it. I think the current prices they are charging business class passengers on the Coast Starlight are a non starter. Like any business you have to know your audience. Those prices may be ok to business class passengers since they are already willing to pay a premium for a quiet car and more space. As far as the typical coach passenger I don’t see it happening.
At the minimum I hope they bring back the popular blue plate special to eat at your seat. I think that would check all the boxes. 15-20 bucks for a hot meal and a bottle of water to go. It’s not out of the box thinking it’s what they used to do.
But as a coach passenger I’ll pay whatever for dining CS access.