It would be very neat if, when spawning on foot, the start time could be chosen arbitrarily and not just in 15 minute intervals. I often want to go somewhere to see or take over a particular service, but waiting within the game for 10 minutes next to empty rails can be quite dull. I'd like to be able to specify the precise time when to spawn. At a future date, it would also be cool to be able to "jump" between spawn points in an ongoing game in service mode. Both features don't seem terribly complicated to implement, but of course I'm not too familiar with the inner workings of the game.