Same as Alastar, too many comments to read if it's already been suggested.
Anyway, I feel that one of the major problems people have with ee wars is that it's for a specific type of build, all other builds are rejected because they might leak. I love the idea for the group hunting but I can see it having the same problem. What if it required a small att build, mid att build, large att build, tank, hybrid, and large hansel? Or for the two kingdom teams have an att build and spy build?
Either way, support! This seems like a very well thought out idea with potential