An idea to make commissars more balanced, fun and realistic they would be given the ability to give a conscript unit 15% more durability but also the commissar would take his revolver and execute one conscript for a trade off. Another ability would be the commissar would give 30% more durability, think of it as order 227 not one step back. But also execute 1 conscript and if the conscript would retreat another commissar at the base would take his revolver and execute 2 conscripts upon returning to base, as a blocking detachment. If there are not more than 2 conscripts in the squad when returning to base the commissar executes the entire squad for cowardice. Not only would this spice things up it would be historically accurate.
Idk how to brake this to you but order 227 was not that much about shooting people. They would shoot over their heads at best in 99% of times. Most times they would be sent back to the front or in worst cases be sent to a penal battalion. Sooo yeah.. Why shoot your own soldiers? Especially in like Stalingrad or something like that.