I don’t think there will be a very realistic way of turning a train around.
At first everything will go smoothly, but after a while you will expand your company and multiple trains will probably have to stop at one station. If the locs have to go around the wagons to reverse or drive to a turntable, they wont be able to do that if there are already 5 trains waiting on the tracks to load/unload.
So I expect that ‘in the early days’ trains will just flip around (unfortunatly) and when the more advanced trains will come, the they can just reverse, ’cause most have a loc on each end.