I think driving trains with a keyboard in LOTUS is not very convenient, I can't see the throttle when the main view. there also no meter or HUD to tell me the power.
A controller is better, but not everyone has a controller, and mine doesn't support some trains in LOTUS.
Maybe OMSI has the best driving experience with the mouse in many public transport simulators. I have driven some trams in OMSI with the mouse, it's really good.
So I hope LOTUS also can support this feature, Thank you.