can we have A LOT more infomation on your suggestion? what locos/trains would be included in the route? Can we have a map of the route? what stations? how long is it and when is it set? is it modern era or BR era? I say this so many times with suggestions like this but putting no thought / research into suggestions (i.e just writing one sentence with no further detail), will not catch the attention of DTG or any 3rd party developer. I once told another newbie somepoint last year that it's best to treat your suggestions like you would for your CV - You need to sell your suggestion and make it stand out against other suggestions and get people on board with your suggestion.
This sounds like a good route. I would like another major London Terminal but I do not know much about this route. I am familiar with Stansted and Hertfordshire as I do not live to far from there.
London Liverpool Street with runs out to Colchester and Clacton-On-Sea would be brilliant. I started a thread about it with loads of great feedback.