Because you can guard on some trains make it so there are guarding scenarios, you have the job of opening/closing the doors making sure you depart on time but also able to do other duties like managing the passengers with their tickets. Also to add you could implement a system where you have to move people away from the train or sort out some passengers. With the ticket system you could have some passengers not having tickets so you have to kick them off the train, if you don't then you don't get points.
Uhm... that kind of is the one guard scenario. Your acting like we got guarding as a service pattern instead of scenarios but nope. We need guarding for services but hey we'll take more games scenarios
If guard mode comes to timetable mode it could work like this. If you sit in driver seat you drive the train if you sit in second mans seat your the guard/conductor
Already a thing in glossop line. From one of the streams, matt said guarding scenarios will appear in routes moving forward but it's not always fulfilled
