Actually we had that in Rome 1 and we have it in Rome 2 (and previous TW games) too, if you host a single battle you can change between the more arcadey mode or the more realistic mode of battles. However this does not affect the campaign, and that is where the pain of streamlining hits the most I think. Giving two options, in addition to the difficulty we already have would be a smart a Solomonic solution. Good thing you mentioned it, baptistus.