I think you get the point, BauMan. And yes it has been suggested before a few times, and those threads met with the exact same response.
I'd like to throw in my 2 cents though. I am a PvE guy all the way through. From my previous experience with MMORPGs where everyone could get up to level 60 or further, I took to this level cap right away. Why? Because whenever I played an MMORPG the same thing would happen; I don't have as much time to spend on the game, so all my friends would surpass me and get much higher level than me. Then we couldn't play together. The level cap of 20 is a very nice touch; I don't lose touch with people (unless I want to), because we are all the same level. It's impact on the PvP scene is obvious, but I think it does tremendous good to the PvE aspect as well, and I've always thought so.
Anyway, now that I've said my part, I'm closing this.

Yes, I get the last word, suckers! I'm closing it because it's been suggested many times before (and consequently shot down). We do not need multiple threads that all look exactly the same. Use the
Index of Ideas and the
search function before you post.