The problem: the obvious problem is that people want to use their heros in wars and its understandable they're a huge part of the game and the way people attack so when you dont have one or both it makes wars very difficult. Especially for smaller clans that cant war when 1 or 2 members are out because of upgrades.

The solution: Firstly id like to say i know that this would require a huge amount of server space since basically you need to double the amount of players and bases and it may be entirely impossible to do. I would however like feedback and different ways it could be implimented or different approaches to put something like this in the game.
You would create a totaly seperate village that you use for war.

What this would allow:

1. Heros to be up while theyre upgrading on a regular base.
2. buildings to be useable while upgrading (the spell factory/barracks)
3. war clan castle troops do not get killed by the being raided


The base baiscally allows and offline version of the game that is only used for war (obviously not offline just in terms of general matchmaking and raiding) allowing smaller clans to continue to war and also keeping the competitive edge of larger clans up