Allow clan members to decide if they want to participate in clan war

i'm in an active clan of mostly friends and family, but we have a few once a week players which hinder clan war operations. you guys should allow members to decide if they want to participate in clan wars once the leaders decide to start war. lets say on a weekly basis. beginning of the week have a 2 day prep where the first day the membership decides if they will participate in teh wars for the week. if they don't reply they automatically aren't included in the upcoming war when it starts.