Brettanomyces
The amount of time it takes the most engaged 20% of the playerbase is what will define the game's economy among other things. The fact that many players wont play as much isnt really relevant, what matters is the number of hours it takes to earn 60 levels of experience with how theyve tuned it.
Edit: I think what bothers me most about it is it feels pretty out of step with most of the rest of the game's design. Corpse runs, exp loss, the extreme price of buying all your spells, the gruelingly slow rate of skilling up the trade skills, the inability for most classes to solo most mobs, etc.
You have all of that but then the exp required to level seems like it's tuned from a different game relative to those things.
