[Dornil]

The old AI were turning in planes not suitable to turning....BAD
The new AI is booming and zooming in planes not suitable to zooming and booming....BAD

Correct. But I preferred the first variant.

But the real problem is the AI cheats in overheating and visibility and other things.

Unfortunately this seems unlikely to be changed. But in the pre-4.00 all this was not so noticeable as it is now.

...simply firewall the throttle and climbing forever.

That's the main reason why I want the earlier AI.