Well, I just discovered another wonderful aspect of this new game addition. You can't add or drop members during the entire time you are participating in this event. This even includes the time after you have "lost."
This is ridiculous. It means that if you choose to enter Alliance Wars, likely for at least half your week you won't be able to add or drop members from your alliance. Do you have any idea what a problem that is?
It just gets worse and worse. We'd have been better off skipping the event entirely.
This isn't a bug, it's in the ruleset before you sign up:
"During Battlefield, alliances are not permitted to disband, expel a member, or have new members join."
Otherwise it'd be easy to exploit moving members around to win rounds (for instance, an alliance that lost moving their members to another alliance in their kingdom that's still in it).
The problem is once the whole thing glitches out and can't finish naturally it seems to take Aeria like at least a month to remove the system themselves, during which time those alliances still can't make any changes. It's happened to s1 players twice already.