Wow, thanks for all the replies. I think all agree that there was indeed need for new leveling grounds. I also met good players who didn't want to grind hours and hours through wt4 again and got stuck at lvl30. So I'm all for better options, just not a "dance around the fountains 100 times".
Maybe an idea is to award more XP for HANDING IN (daily) quests? That would make leveling less boring?
And a bit off topic perhaps, maybe a messaging system (like ingame mail) so that it's easier to form parties?
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