Players not able to join their friends on closed domains is currently the biggest problem I see with KOC. Ok, here are a couple ideas how letting new players join old/closed domains can work.
- Every 90 days purge players with less than, say, 2 days worth of might - about 5k.
- Allow players to delete themselves from a domain. The caveat - do not allow them to rejoin that same domain for 45 days (to prevent abuse).
Then, as players are naturally cleared out allow players currently on those servers to invite friends.
Not only does this clear out useless bases, but it allows for a method for friends to invite friends onto previously closed domains.