UPDATE 1/22: Patch notes have pulled down and test server is still not up. It seems that this was posted early by mistake.
Main Features of this Public Test
A new branch of German ground attack planes, markedly different from ground attack planes of the USSR tree in their Flight characteristics and armament, what makes ground target attacks more interesting
A new fine-tuning feature for in-battle markers of planes and ground targets (more visible markers of ground targets for ground attack planes, or more visible markers of aerial targets for fighters)
A quick Flight auto-search for players who prefer team play