Different liveries include br black lined/ early crest and br green. Cambrian coast line with manor class Services from Shrewsbury to either Aberystwyth or pwhelli. I think it’s about time we have a GWR steam loco in the game and this class is one of the more popular ones. The route itself and scenery is undeniably beautiful as you travel through wales and the Cambrian coast. There are 9 preserved in the manor class and could be used as a loco add on for any future heritage railways or wsr.
Good call, though the whole Cambrian network might be too big. Machynlleth to Pwllheli more do-able. And while I would love to see some GWR steam in TSW, it's going to take a major overhaul of the current implementation state to make it worthwhile.