I have been looking at the FRC published enhanced screenshots and video, because of my past interest in Feather River Canyon and the subsequent extension by dleeboy (plus my extra personal additions along the extension track).
The new route seems to really be an extraordinary "enhancement".
All the stations of the original FRC have been improved in a very nice way (it is nice to mention Oroville, how it looks).
The three pics related with the extension show better than the same places in the old extension (2016...old it is

) like Williams loop portals, Clio trestle and Portola passengers station and yard tracks (what mostly drives my attention is the way Portola looks... a lot better than the extension).
I would have liked to have at least 10 extra miles in direction to Hawley, so scenario designers could have better options for the western entry ops of the Portola yard. Maybe someone.
The new rolling stock looks also very interesting and abundant.
Jorge