I suggest that all clans have a leader and a substitute. That way, if leader must be absent for reasons of force majeure, substitute can enter or kick members. Currently TS takes too much time to make the changes. The existence of 1 substitute would solve many problems.
I propose that any member who has left the clan (either accidentally, kicked or by their own will), will not be able to return the clan until opening of next tournament.
Any member who returns to the clan or any member who is first time admitted to the clan cannot have a rank lower than 2 points below the clan classification. E.g. If the clan is classified in the League with gold skull, the member who returns or who join for first time must not have a lower rank than a bronze skull.
These last two proposals would avoid or discourage the trick to exploit newbies.