Carmarthen would be nice. I would like to see the lines around Cardiff added into SWC. The line from Cardiff down to Barry Island and up to Radyr and Coryton. More opportunity's to use the Arriva Trains Wales DMU pack then
Would be great to see a South Wales valleys pack set around late 50s early 60s,lots of freight & passenger opportunity's & could be used by Steam & diesel.
A very good freeware route is available which extends the SWC route from Swansea to HaverfordWest and milford Haven via Carmarthen. Needs a bit of payware but well worth it. http://www.oakwood-shed.co.uk/sww5/sww_route5.html
South Wales Coastal to Milford Haven, Pembroke Dock and Fishguard. The freeware route is not very good or accurate.