This might just be me, but I wouldn't put the Lord Commissar in with Chenkov. If they fail the morale check, POP goes the Russian!
I'd actually merge those 2 platoons, combine the infantry squads into a single squad (and put the commissar with them), then get a veteran squad for your second troop choice. That way, the Lord Commissar is surrounded by a mass of bodies, and can still give the conscripts their inspiration.