Would be nice to have another Heritage Line, The Mid Hants Railway or The Watercress Line is a great option especially when Spirit of Steam came out. Try adding class 50s and a class 37, Or you can try adding the Southern Schools Class Steam loco if you would like. Class 09s and 08s would be a great option since you can use scenario planner to add the desired locomotives youi want such as a Jubilee, Class 47 or Class 101. But Steam Engines are the main attraction.