kelward: I find it very unfair my cc with 135 members has to compete against a club with 200 or more that always gets first place just by sheer numbers
Not so true.
The key to winning a Clash is participation = games played. Of course, a big CC with all members playing is a force, but it may be different.
A few more thoughts:
Winning clashes is not the goal of the Events - amassing points is.
Match setting may be more difficile than you think: Two CCs must be available at the same time to start a game, and nobody wants to wait forever for a fit.