A few more things I'd love to see.
1. Custom Waypoints for all Routes. Right now the game uses the "shortest" route possible between stops to connect them. I would like to be able to manually direct the line route, even if it is not the shortest. Or at least give us an option between Manual and Automatic route making. This should apply to all types of routes and vehicles.
2. Rush Hour + Regular Schedules for the Same route. In real life, in most cities the most popular bus routes adjust their paths during Rush Hour to be shorter, or to avoid less popular areas. Once the Rush Hour passes, the buses go the full route again.
3. Single-lane rail track building. You should be able to build single-track railways for subways and streetcars. A lot of the time, the 2-way only track mode left one side unused and it also limited places where the streetcar/subway could go above-ground. For end-route loops as well, it only makes sense to have a 1-track loop, instead of double-track loop where the inner-loop is never used.
4. Ability to sell advertisement space on your vehicles for an additional revenue source.
5. Ability to choose between a Transfer Fare System and Pay Fare Each Time System.
6. Vehicle maintenance upon entering depot.
7. Buses should be able to take-over other vehicles and broken buses. If buses can not go around an obstacle, that only makes them a cheaper streetcar. But they are still on-rails, so to speak. Buses have a few key advantages, and one of them is flexibility. They can go anywhere. They can switch lanes to avoid problems. Without this advantage, they have no real reason to be used.
8. Adaptive pathfinding/Detour system. In the real world, in case of an emergency, buses do not stand there and wait for fire/police/parade vehicles to clear out. They use detours, and find the shortest alternative route to their destination/stop. In CiM1, detours couldn't work because time was measured in months... but now that we have realistic day simulation, Emergency Detours for buses should be possible. Same with streetcars, but only if the rail network allows for it.
But thank you for CiM1 and now, CiM2 and I'm going go get it on Day 1 no matter what.