I would still like to see the M-42 in the doctrine. It's a shame, I like the unit (in concept) but it is just terrible in every way. They need to give it the puppchen treatment and make it actually useful as a viable at option in contrast to the zis. Give it some more utility through abilities like the puppchen has (I don't mean exactly what the puppchen has). It seems like what they were going for was a commander to replace t2 in t1 heavy builds, but it doesn't work out because of lackluster at performance.
Could switch IL-2 loiter to M-42.
I often use Urban Defense doctrine in automatch, and the M-42 isn't so terrible. At 200 MP each, you can get two of them and keep them in pairs. Good early game vs light vehicles, but sadly becomes terrible once medium tanks hit the field. I think it should be a highly maneuverable AT gun. It should have the sprint ability that the British AT gun has, and increase penetration.