What I'd like to see, as a clan leader and member, is an extension of this idea:
As a clan member - I want the option to specify the maximum number of games that I would like to play for each clan. This should be displayed to my clan leader in the members info page and he/she should not be able to assign more games to me than my max value.
And obviously I like the idea of only being available to only clans that I select.
As clan leader - this would give me a better indication of the amount of games each member is willing to play and will make management much easier.