It's just that in CA, the teams matter so much.
If you're too good, you end up dragging your nob team behind you.
If you're mediocre, you end up as cannon fodder.
If you're newbie you end up as minced meat.
Also, lease STOP that dm6 love affair some ppl have since Q]|[A. Playing Holy Clan Arena Multi Player Grounds is boring. We're in 2012. Sad to say it, but this map is overplayed and overused. But hey, if you want a cheap win, you pick up your old fav dm6 and roll, don't ya.
All CAs I ever played in QL were wildly unbalanced; more often than not I was unable to get the drift of the match thanks to stacked teams; You can't join them, but they happily get a W on you.
I used to play CA in q3 and it was fun, even then there were people who took immense pride in their ability to outmaneouver and outaim everyone.
CA has its maniacs as does duel or TDM.