I have found that clans lose many starts due to heroes upgrading. My idea is that heroes are like your base and separate from your war base. like heroes and war heroes. They are the same level but can be used only in war battles. that way also if heroes are due to defensive roles in main base they can be used in wars. This could be applied to troops also so loot can be profited in elixer and dark elixer. Heroes having this change is a must in my opinion. Let me know if you have any ideas or tweaks to add to it. :) sorry if this is unclear the point is if a hero is upgrading it should still be able to be used in a battle.
