The class 333 in my opinion is one of the best emu's in the country, these 4 car units operate multiple routes around the Leeds area. Leeds to Skipton is a route I would like to see as it includes 10 Stations and you will be able to drive past some heritage locomotives at Keighley. This route contains many hills as you are close to the North Yorkshire Hills.
If the Class 333 were produced, it would probably be beneficial to also do the Class 332 Heathrow Express variants at the same time in order to add realistic layers to GWE with drivable services from Paddington, non stop to a red signal after Heathrow Junction and return. It would certainly make GWE more lively and realistic. Making similar types in parallel seems to me to be a good way to do things as we'd all get much more content for a set amount of development time and i am surprised that this doesn't seem to be the current work pattern. Original suggestion is good though.
