When operating the minigun, sound is fine, now when you fire and have use any external view, sound is like any heavy machine gun, actually more like a 12,7mm or similar not that of a rapidly firing Gatling weapon.
That look pretty nice. Very realistic clouds and sky in general. Dont think it gets better than that. Certainly a lot better than in a commercial level D sim I have to fly every 6 months.
That depends fully if perf is a limit or not. Not only is the FE a qualified crew member, he is also a qualified engineer and can perform maintenance on the aircraft, especially important when operating forward or unimproved bases. Alas it depends.
Combat use has seen ammo boxes and crates used as seat...