Would actually be fun to play like that, I feel it would be more appropriate when calling in commissar. If the Commissar unit dies the retreat button is reactivated until it get called back in. However the commissar buffs would either need a faster cool down or AOE so more units benefit to offset the retreat nerf.
alternatively, with this doc activated, every time you press the retreat button your commissar executes a random infantry model and the globel rate of fire of all infantry gets buffed by 30%