can't agree more with this!Just some random thoughts I had:
Mmos require progression, that's why pvp-only servers fail. They require no effort and can be picked up as easily as they can be dropped.
People must feel the need to work towards a goal, whether it is level wise, gear wise or NP / ego wise (symbols help but they aren't enough to sustain a pvp only game). Usually MMORPGs spin around being "the best" and of course having fun. There's a reason why people no life it in new servers or baba it up. They want to be the best, or at least competitive. Even if it's a secondary goal in a mmo, its always sitting there.
The problem arises in the fact that KO's sense of progression is outdated. There's no immediate reward without immense amounts of grind and commitment, and if by any chance you make it too easy then people reach endgame / top gear stats and quickly get bored / leave. KO isn't a casual game where a player says "oh well I got my FP set so I'm happy now, I'm gonna devote the rest of my time to have fun in pk!" they always strive for more and more gear.
That reasoning makes it seem like medium / hard farm servers are the way to go, but they also have a downside and that's the simple fact that people won't bother starting in a server that is already old. Nobody likes playing on servers where you missed the headstart and everyone's already 70, and that holds true even for official KO servers.
It's extremely hard to find a happy middle ground and I admit that while I haven't really brainstormed about it, I doubt I'd figure out something that fixes these issues without altering the way this game works. There's just a lack of tech in its engine.