...concerning the gun.

I hope this can be fixed in the future.
http://www.creditgif.com/02.jpghttp://www.creditgif.com/28.jpghttp://www.creditgif.com/03.jpghttp://www.creditgif.com/05.jpg
http://www.creditgif.com/04.jpghttp://www.creditgif.com/29.jpg

'Autopilot' is not the same as 'AI' - technically. Ok, it is more than a simple autopilot, its rather an autofighter. It lets you have just more control about your plane. If it was like AI, it would bail out, even if you don't want it to.

Just don't expect it to be a full AI. Its YOU, who shall play the game! :)

Good finding! It can be fixed for sure.

Talking about AI and autopilot - both drop flaps at speeds, which normally make the flaps jam. Do they really have to do that, or can it be fixed? Spitfires even use half flaps, which is completely unrealistic (there was no such thing in Spitfire as half-flaps, it was either up or down)
Sometimes I use autopilot + time compression to speed up things in a mission, but when I switch off the autopilot, it turns out that my aircraft has flaps jammed in down position. Very irritating.

Terrain avoidance
 

Recently I've been playing a USMC campaign at Iwo Jima and on a ground attack mission my flight were tasked with striking enemy bunkers at the foot of Mount Suribachi. The DGEN system routed us in from the opposite side of the mountain to the target, resulting in most bombs hitting the side and summit rather than the bunkers! I worked around that by opening the mission in FMB and altering the approach to target. (DGEN can be quite stupid at times. I've seen AI Stukas start their dive at as little as 1500 meters)
The main problem is that on subsequent passes my AI companions make attacks from angles that lead to them crashing into the side of the mountain!
Can anything be done to improve terrain avoidance?

Yes thats somhow annoying.
Leading an AI or Autopiloted plane throug a series of waypoints through a gorge (Mountains Map on stock or Grand Canyon Map with DBW) will mostly end up in crashes. AC-behaviour is completely messed up in comparision to the same set of Waypoints in a plains environment.

Also it happens when a plane tries to land in some airfields like Kara's

I've been playing Amagi's Disaster on the Frontiers eastern front campaign for a long time now. With the new AI behavior in the v4.11 patch, I now routinely get Veteran and Ace Bf109F pilots regularly getting owned by Rookie and Novice I-16s. The problem is that the AI 109 pilots are trying too hard to stay behind the I-16s when the latter makes violent evasive maneuvers. They end up getting into a slow turn fight against the I-16s, often at low altitudes, an area where the Russian aircraft holds a distinct advantage. Too many times now, experienced 109 pilots are getting themselves shot down by rookie I-16 pilots (Type 18s and 24s), and even by I-153s. The regularity at which this occurs is frustrating if you're playing the German side, and has been a definite immersion killer for an early eastern front scenario.

Previously, before the AI upgrade, German AI 109 pilots always made fast sweeping attacks on enemy fighters and was obviously avoiding getting into a slow, low turn fight situation. They routinely dominated Polikarpovs in early war scenarios, as was the case historically. Not anymore, as things turn into a bit of a mess now.

Tank busting with MGs, particularly with LMGs, is a pathetic effort IMHO. Planes with a light onboard armament (like Cr-42s or R-10s) should waive their attack on hard targets once they've dropped their bombs. Similarly, JABO 109s should immediately disengage and switch to pure fighters once they've run out of cannon shells. Or am I wrong?