If we got rid of the numbers do you think it would get rid of powerlevelers? With the exact same system in place (Even though it needs replacing) do you think if the numbers weren't there to be plainly seen it would discourage people levelling for the sake of levelling.
I think the only way to limit levelling for the sake of levelling is to limit how much levelling a character can do. One way to do this is to limit how many skills you can be good at, and I think Xordan has said it's on the to-do list.
I'm in favour of a number-free system. Remember how weapons used to be? You knew what they were called, but that was it. Players didn't have access to the stats and it was great. People experimented. They compared notes. Heck, they even used certain weapons simply because it's what their characters would use! It gave the game colour and uniqueness, and now it's gone.
I'm in favour of a number-free progression system as well, but I don't think that stats should be hidden entirely, nor do I think it's the best way to improve the player base. Instead of a rating of 1-200, it should be based on more subjective qualifiers such as "horrible, poor, average, fair, good, very good, elite". Or something similar. This can only happen once skills can be levelled without constant visits to a trainer, but there's such an incredible push for that that I can't imagine it not happening eventually. (For those who don't know, the idea is that you can get better at something simply by doing it often, and trainers will merely speed up the learning process.)
Why would we want to get rid of these people? Well they aren't productive to the community and they are typically the type who use leet speak.
They've learned not to use leet speak, but what's worse is the emphasis some put on duelling as an answer to everything. They have a habit of inventing IC grudges to act on OOC grudges. They /shout cusses at people who refuse to duel, and they don't bring anything to the game in terms of roleplay. It's less often that I see them list their stats in their character descriptions, but that only means they've become more self concious over time.
The thing is, all of this wouldn't be so bad if it weren't for the fact that they're scaring so many people away from the game.