Yea I understand that we can always De-exp to avoid leveling -up ... but that's too much work ... aside from that, level capper might be a game changer for everyone as you can include difficulties for each level cap (like you should buy a level uncapper via vgn points which would be NT or if you don't want to buy, you can just slave yourself to reach the minimal requirement for level uncapping like: 1. must be on a cap level... 2. must have a certain amount of golds, 3. must have a certain amount of rank points, 4. must have a certain achievement, and so on --- possibilities are endless) and might even attract new players once they learn that they have a number of options in-game.
I think the problem is not because "the game is intended for end game" (it only became like that when you increased exp rate and added boosters). Players don't exactly need "petty" events that does nothing as "game-changer", rather players look for something that is worthwhile in mmorpg's like this --- something to work hard for, something to be "proud of", and something to look forward to aside from end game.
If you can include new maps and cap (which I believe is much a difficult task o do) I think, I really just think, a level capper wouldn't be that much diffcult.