The actual single member ranking system is piss poor as well. So I can only imagine how inaccurate the clan system is. I think that the events don't go as noticed as they should, but to my knowledge, I'm pretty sure no points are awarded that affect rankings from big events.

In a perfect system, you get points for winning, lose points for losing. Good opponents, relative to current rating, give more points for winning and don't punish you as hard for losing. Bad opponents, relative to good rating, give little points but punish severely. In addition, the amount of games makes the wars more influential, and clan diversity use of players, capping at around 5 unique players per team, also influences more points. That is to say using 5 people to win 20-0 against a good clan would boost more than 3 unique players for 11 games.

Think gynx said it best- not enough active devs