I have a few suggestions:

1. Don't make JJ2WC II in Summer ( July/August ). Most ppl are going away on holiday then, and clans won't complete their best warteams. Also then is JDC, and 2 Jazz tournaments in the same time is in my opinin bad idea. Better way is make jj2wc in something around /march/april. JJ2WC is active only at weekend and all people have time then.
2. Make new rules about supervisors. If supervisor will leave the server ( cto, pc crashed or something ), the time have to be stopped, and all players should wait for the supervisor, or some other supervisor before they will start playing. Someone have to count time.
I wrote this, because you left server in last round VS vs GpW, and that made many troubles, because we won it 6-2, but you counted it as 2-2. It shouldn’t happen.
3.Don't delete old news from site. Also the site could be better and more functional (news commentary, more details about matches etc. ).
4. Groups should be drawn. It's more fair.

About lvls.....I think clans should choose for example 6 lvls, and they will create maplist.
The bad thing is that the most lvls aren't symmetric, most clans chose semi as their homemap because blue has big advantage there.

Really interesting, but you should find 3 hosts at the same time. If only one man will be the host, clanwar in this system will take hours.....