Sorry, I had to laugh at this point, which is an enormous, gigantic understatement. I mean not much has changed in the 2.5 - 3 years since that franchise plan was drawn up, including a devastating global pandemic causing a dramatic shift in travel patterns, and the original operator of the new franchise leaving next February.
I'm just an onlooker, but I'm pretty sure any rolling stock plans drawn up 3 years ago can now be taken with a pinch of salt. The introduction dates of the new Stadler vehicles for the Valleys come with massive caveats. It's already been announced that the infrastructure work on the Core Valleys is delayed by 6 months, with the Metro Vehicles not entering service until the end of 2022 and the Tri-modes for Rhymney through to the VoG coming into service end of 2023 at the earliest.
Don't forget it's not just the 769s that have been delayed, the 230s for North Wales and the Mk4 coaches are also very delayed in entering service.
Low density - so not 3+2 facing seating?