It's a shame that PvP servers have attracted hackers in the past. A PvP environment is actually one that could address some of the "ubermob spawn rotation/conflicts" issues. The group that fights for it wins it
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The server would need to be policed somewhat, mostly to avoid the hacking, the training and exploits. After that it's pretty rewarding, though. It's a fun experience having to turn up your game a bit, constantly watching who is in zone, being careful with your resources so you aren't too weak when others are around.
I hope there's an opportunity for it eventually.