Add an option for every member of the alliance: join or not join to the war

I really like play in the alliances war, but sometimes i dont wanna spend my food in the war because i want to upgrade something, but if i dont fight my alliance pay the price, i would like the royal revolt team introduce a new sistem to select only the members of the alliance who wants to join the war. 

Would be great if every each member decides if he/she s gonna participate in the war, or also if the leader and the generals have to decide it.

This is good because some members are high donators but poor fighters. At the moment I am having to weed out the non-fighters every war season.