Hi,
Something that would be awesome is a possibility to send orders to AI trains not to pass red block signals.
Always they do after a few seconds of waiting, making them driving in 20 km/h and, in many cases, destroys the traffic flow. And if another train is behind, that AI will do the same. Other trains then need to wait extra long. Pendolinos for example, are fast and tend to reach red signals faster. Let's say that an IC train is not fast enough (after being held at entrance signal) to run into a siding and the Pendolino starts driving in 20 km/h for about 1,5km. Either the IC could continue with the Pendolino still behind after a while, or the IC is still being held, causing unnecessary delays for the IC and other trains around.
Often it's more than just two trains involved for this scenario, like 3-5 of them, and some are delayed or too early, and actions need to be taken to make trains continue in the right order, depending on delays, max speed, etc.. This scenario is not very rare I think.
Player drivers can always be requested over radio to make something different, but AI's is always living their own life. If it was possible to tell an AI not to pass block signals, it could wait for an extra minute and then continue running at line speed, and extra delays could be avoided.
Cheers