Alright, how about this. Once you withdraw your application from a certain clan, you cannot join another for say... 7 days? This is conducted in order to prevent consecutive clan "hopping"'s from occurring.
Clan member limit. Now, we all know that pretty much just anyone above the rank of Jounin can start their own clan and bring in their alts, despite the rule existing so that they [alts] cannot be used to benefit any one character, yet there are clans of 10+ members with just 2 people, one of which has the many alts frustrating those who're bothered enough to care. Perhaps there should be an 'expansion' option...
Example: Say you started a fresh new clan, your automated member count limit would be set to 10. Now, to increase it, you'll need to buy your way up via a deposit of Gold and Gems.
Each upgrade increases the member count limit by +5.
1st Upgrade - 1500 Gold 0 Gems (+5)....... 10th Upgrade - 500000 Gold 200 Gems(+50)
Because I see clans as being nothing more than 'simple interest groups', and wish to see a little RP progress albeit the lack of progress and such...
But oh well, it's the idea that counts. I'll admit I'd be a little bummed if neither option's passed, but at least I got the load off 'ma chest.