Good shout though I would prefer a slightly earlier era so you can get Pacers and 150’s on the Severn Beach line. It would also be daft not to include Bristol Parkway and the freight line through Hallen Marsh. Set back in the late 00’s you could have the coal trains out of the Avonmouth BBHT heading off to the power house at Didcot or Aberthaw.
I just drove this line in TSC with AP's new HST pack and I think it would be great for TSW. I would prefer if it was set so the HST could be used either subbed in or included with the pack. I also think that Bristol Parkway have to be included so the express passenger runs make more sense.