Well we came up with a couple house rules becuas the rules as written dont seem to make logic or lack some balance.
First a free action cannont generate another free action so when you move and get your free fight event if your rolled 100 times you would not generate a new free action. This prevents the chains that doesnt make sense unless the intent was for the tazmanian devil to come tearing across the battlefield.
Second to prevent the first turn your dead and to give more flow for the game you use the first stat of teh command rating for the number of models activated so instead of activating 6 models the plague would activate 3. This seems to keep teh games form being one-sided and make for more flow between the games and thus a better balance.