The Aerofly FS J.F. Duchess lacks manual prop controlls!
Think of a 15 min hop in a real piston twin or single and look at what FS2 still leaves out, it is too much and has been like this for too long.
Weight and Centre of Gravity.
Realistic magneto operation.
Realistic engine leaning.
Icing and operating anti-ice.
Electric fuel pump operation.
DME with ground speed and ETA.
Nav aid confirmation audio idents, drummed into real world student procedure from the earliest and instant fails if missed in a test.
Realistic cowl flaps function.
Engine gauges responding to pilot engine management.
Realistic engine performance and adjustment with altitude, density and temperature factors.
Nav aid degradation at low altitude and among mountains.
Fuel injection engine start procedure.
Convincing side slip to dump height with limited speed increase.
Side slip drag flying a twin on one engine if not slightly banked into the live engine.
Feathering propellors with very high windmilling drag.
Minimum single engine control speed rudder force and loss of control wing over departure.
Operating fuel selctors.
Operating electrical systems and gauges.
Operating twin cabin fuel burning heater. Ice inside the windscreen at altitude if not working!
Deicing windscreen panel.
Emergency system controls.
Consider the reception of an add-on aeroplane for the FSXs or XPlane that lacked most or many of these features, it would be subject to pitiless derision.