An issue that has long been a nuisance is that when a guild registers for war, with at least 10 members, but unfortunately goes below 10 during a week, that Guild is still able to participate in War. What happens is that a Guild with, say 50 members, gets matched up against them, you'll get a ridiculous situation when there's only less than 10 towers to hit.
Today, my Guild (Last Call, S2) was matched up against Mythical, who only had 3 members in their guild. We have 48 members on our team, and only 3 towers to attack.
This was an issue under PerBlue, but we're hoping GREE can review and fix it.