In all my COH2 life, I have met only one player that had sniper + commissar duo. He absolutely wrecked me with just these 2 units. But I cannot really imagine how microintensive that must have been.
I think it's worth a try for sure.
I feel the combination works when the commissar is used for Fear propaganda. The movement nerf/pin allows the sniper to get to work and give you a bit of micro leeway. Whereas, the buff require more precise micro due to the fragility of the sniper.
I do like using Soviet reserve conscripts into sniper with commissar. The conscripts will deter LV dive and fear propaganda for blob control. I personally like PPSH but it is easier to just get 7 man when available. The AT drop rounds out any needs and howi is great. My biggest gripes are it feels suited for Penals but doesn’t work out well due to MP cost and the commander requires you to outplay the opponent from start to finish. Nothing to get you back in the game.