The Vikhrs on the KA50 is it’s main weapon, and I think it should stay that way. Same with the future Kiowa, Hind, Cobra, Bo105.. the list is long :)
Fixed wing aircraft are bit different, but the way the Harrier has been shaped is a great way of keeping them in the sim and adding Harrier pilots to the server.
I think the Harrier should be added to the majority of the missions, purely as a ground pounder. The SU25 has got it’s R60M’s removed or heavily reduced, and it doesn't really matter since it usually flies in with CAP.. and so should the Harrier.