This averaging of range is funny, at least I feel that.
Imagine that you recruited 10 melee SF to your 10 men of range 4 SF. Range drops to 2. Now how would you RP that?
When you have 10 4-ranged men, their special ability is to magically always have the wind in their back.
When you add melee guys, they shield the wind, and the arrows don't go as far.