RAGE AHOy

High levels need something new to do that doesn't involve HHG1-class challenge.
inb4MapleIsFreeAndThereIsNoObligationToUpdateAnything
[spoiler=I'll just rub this in your face]Content-wise, we have the biggest updates coming through the rest of the year. We're talking HUGE. Every level from 1-200 will have new experiences to share, and new challenges to conquer. If you thought the last update was big, wait till you see what's coming.[/spoiler]

Remind me again, what did 15x+ get?

Considering that that's from April of 09, I'm gonna have to say (things that benefit 15x+, but are not specifically limited to them):

Temple of Time - New Training areas for certain classes
Maker - The ability to upgrade to Reverse equips
Mu Lung Dojo - Belts (Also the Witch Belt Event, I guess)
Cygnus Knights - The ability to get Blessing
The Secret Agent Event - Introduced some pretty fun equips, the best of all being the earrings
Malaysia - Scarlion and Targa Helms

Yeah, some of those were a stretch, but they did kinda deliver on their promise, and 2009 was a pretty good year. While it's stupid of me to be assume this, I'm sure that they have some pretty nice things lined up for 2010 as well. NexonKR's new high level area may not be a great as we expect it to be, but we should get it by the end of the year, and it should be something. We just have to be patient, the game's not going anywhere.