Sadly, I think the time has passed for Bohemia to consider a “hardcore” simulation like that again. TOH badly burned them as I understand it.
I had been hoping that TOH would be like SimCopter II when they announced it, but it was not to be. So close, yet so far; my major disappointment was never being able to bring an Apache into the game when it was popular. I know of several people who approached Bohemia with offers to do addon helicopters and missions a la FSX, Xplane, etc. for TOH, but Bohemia turned them all down since ArmA3 was their focal point.