How bout this for a scenario. Say we have 12 experienced players on both sides. Where skill and builds cancel each other out. Each caps shrines the same. Result? I will leave it as an exercise for you all!
@Mog: So Monks are useless in AB? And I don't see the example. One from the squad dies? Well, rest 3 can do fine without the forth.
I think we have pretty clearly showed what happens when both teams just cap. That's a lot away from achieving something. Of course it achieves something if your capping build is faster than others but achieving by killing is a lot faster.
And no, killing doesn't become bad because of all stupid ways how you can fail with it.