The only problem I see with this is the lack of activity. Captains will not be able to control the clan due to a number of factors. Mainly because not everyone can be on at the same time. Sure, you can leave some notes here and there but it's almost pointless. Most ideas are suddenly forgotten about a week or so later. Like weekly meetings, which was started but didnt happen. So the people chosen to be Captains should be really dedicated to their job.
But there are also some good things, like the Captains settling disputes and the ones creating events. However the ones who create events don't seem to have actual control of the clan... The assistant General's or whatever might not work though, because.... well, who wants to be a slave?

Seriously though, what would assistant Generals do? Please, be specific. Not something like, "They do whatever the Generals want them to do."