Hell yes, definitelly

i believe insurgents should have a lot of soviet surplus (gorka suit, soviet camos, Maska helmet etc)

Would be good to give some of the unpopular security camos for the insurgents side, to make it possible to distinguish between enemies and friends by the camouflage pattern, or at least correct the shades of the insurgents "camouflages" to be more realistic. Many people talk about the problem of identifying "friend or foe", but in Insurgency 2 this wasn't a problem. Anyway, its just my speculation, unless if someone makes a mod for this.

This would be cool, there'd be a lot of confusion since both sides have camo, but that's real life. Makes it more interesting when you have to take a second look and properly confirm it's an enemy before shooting. Instead of one side wears camo and the other side wears bright red and blue tshirts.