In real life, behind the wing you only hear the rush of air from the engine, you don't hear the buzzsaw at all. In this 1.1.7 version, you can hear the buzzsaw from the cabin behind the wing.
In addition, if I'm in the cabin in front of the engine, I hear the flap motor sound in the ear that is closer to the cockpit which makes it sound like the motor originates from the cockpit.
Finally, the spool up sound is underwhelming. In real life, when fuel is added to the engine, there is a "GE90 like startup" where the sound gets a lot louder. The Mango A350 soundpack in xplane got it correct.