This is true, the lexicanum states Commissars start as Juniors, then Captain, Lord, and General as they advance further. Either way - be it Commissars or Sergeants, adding a command Elite that functions as an AOE boon to nearby ranged alllies would create difficulty spikes throughout missions that would make gameplay more interesting.
Rather than Gunner/Shooter groups just being enemies that can be suppressed into oblivion or heavily mitigated with slide-dodge into melee frenzy, with the command Elite archetype in play players may have to slow down, reposition, act more tactically.
As am I, Auric needs more modifier rotation.