Good to see some positive feedback on the clan leadership issue with SuperMechs.
I think a "Promotion" feature for clan members is in order.
With regard to accepting new members by other members, I think that is another post altogether. For competitive clans, this should be highly limited, specially since one wrong member joining can spell success or failure for a top competing clan.
I am thinking more of social clans or not too competitive clans. If the leader decides to go competitive, his clan is technically dead and abandoned, and there would be no more clan to return to once the former leader retires from being competitive.
Hope the poll gets more votes so developers can put it into better consideration next update (which is probably SOON )