I'm sure those who have participated in a clan wars all understand that when someone sticks around long enough to be eligible in the war clan war, they leave right after the war starts. Thus leaving a vacant spot in your clan war, with a member who's attacks will not be spent and village (sometimes purposely left open) to be attacked easily.
One way to fix this could be; if this happens in your clan, and the person leaves the clan and does not return; there will be a queue for the next person in your clan who would be eligible to take the vacant players spot. Once they become eligible after they have recently joined or missed the cut due to an odd number of members, then their village and attacks are added to your clan wars map list.
Maximizing the activity and helpfulness of the wars.

