Again a plea (I hope not an unanswered one):
Pls return the clan invite / leave rules to it's original oficcial state. without a time penalty you can switch clans in a sec and that gives ppl to misuse it. As we all know that trick is being used to keep healers safe in clans that are registered to DEFEND the castles but being hostile to them.
As a second suggestion i would ask of the server staff to make it a bannable offense to use that trick. The clans on battlefield should be the ones registered in open warfare as it should be, not having to lower themselves to misusing tricks like that.
Seeing the situation on the server i would like to add that there is a need to act rather in time ^^. And it will benefit all in making it more fair to fight.