AV backdooring- why is it tolerated?

So I just got to level 51 and started doing AV. What. The. Fuck.
Why is Nost using the old map that isn't fixed to prevent backdooring? That completely unbalances the game, it was admitted by blizzard to be a mistake (which is why they changed it). Why should we have to tolerate it on this server?
Why is Nost using the old map that isn't fixed to prevent backdooring? That completely unbalances the game, it was admitted by blizzard to be a mistake (which is why they changed it). Why should we have to tolerate it on this server?