-In-game leaderboards.
While being in-game, having leaderboards should motivate the hardcore players to play more CW. Simply because they can show off and see how others are doing.
-A more visual friendly way for us to see which clans are in CW right now.
Right now, when we log-in you enter your clan channel or the main channel. When entering the clan channel there is no option to see which clans are in CW right now, or which players. You have like 5~30 clan rooms where all sorts of players are AFK and what not. How about a main clan channel? There you can see howmany players are in the main clan channel, so you can have this vague idea of how many are playing. Besides that, some sorta lists of ongoing wars could be useful as well.
-Monthly tournaments
In the past, tournaments that have been hosted haven't always been successful. I believe that when we have monthly tournaments people will be more ready for it, plan it in their schedule. This tournament could for example be hosted for the top 10 clans at the end of each month.