It's still realistic to be able to shut an engine down in flight. It's just illogical to do so. Perhaps if HT modified the code so that at random times the engine would not restart after an inflight shutdown, it would more accurately reflect real world possibilities.
To draw a parrallel, would it make sense to turn your car ignition off while cruising down the interstate in heavy traffic at 75 mph? Yes, you can do it at will but, common sense, logic, and a sense of survival prevails with the vast majority of people.
HiTech has already updated the code years ago to prevent people from gaming the game by turning off their engines. If you notice, you cannot start your engines automatically at 100% with WEP on, like you could in the past that made it easier for those to turn on/off their engines in mid-flight.
Personally, when I see someone turning off their engines trying to either force the overshoot or gain an angle on me, I know that I've got a kill coming in the next few seconds. I also like to play with them, when I see that they've cut their engine, I will go vertical into a spiral climb and then come down for the very easy kill. Used to love killing hblair like that.
ack-ack