Player train coupling/uncoupling in timetable mode

In the real world, there is no player and AI train, they are all behaving as trains in timetable mode... In the real railway system, a locomotive from shed starts and gets coupled to a train at source station and proceeds to destination. At the destination the locomotive will be decoupled and proceeds to the trip shed. The train will be taken from the destination station by a shunter to pit lines. Hence shunting is very important in time table mode as it resembles the real scenario. Is there any reason for excluding player train shunting option in time table mode? Shunting is essential because as the train moves from electrified section to unelectrified section, the engine has to be changed from electric to diesel. For that the engine has to be decoupled and to be attached to a diesel engine in the loop line. Thereafter the engines power has to be toggled from electric to diesel and after decoupling the diesel engine from the electric engine, it has to follow another loop line to get attached with the train and proceed towards its destination. All the features except this are excellent in timetable mode...........

Hence it is requested to include coupling/uncoupling of player trains in time table mode...............