Very interesting! Is there a modifier for One-inch-Punch?
I agree with the OP as in Black Belt should be upgradable. SE is dishing out a bunch of new ideas with less impact and currently scrapping the bottom of the barrel. What ever happen to the old areas? They're only being used for GoV and VoidWalker events. Abysea, being redesigned using color, so and so...
New Black Belt tier can be included through the classic quest system (which everyone should be used to). I agree, the quest for limit break should be harder but they aren't. Why should a upgrading an item (we worked so hard to get) be any harder? As tedious as it was to get Black Belt compared to the original method was due to the level cap. Who about forget the damn magian trials and follow a chain of classic quest and fight NPCs. Then go fight NMs and save some lives (solo). The whole point is to train on skills, techniques and strength.
I know newbies would like that kind of stuff, so of-course the idea would be cast out but think of the character of the person willing to go through it for the reward. Maybe killing 100 mobs would be too much but ask those DRKs how they got their job in the first place, this would seem "nothing". I look forward to keeping well known gear we all know and love instead of replacing them with something out of a "Cracker-Jack" box. So what if we have to go pop those same "Kings" again two or three more times, if there's no gut, there's no glory!