I think the suggestion was to make more quests, and to make them a semi-viable alternative to leveling. Most of the iRO quests are not alternatives to leveling (a few that I haven't done might come close, but not many). It takes about 400,000,000 exp total to go from 1-99 non-trans (about three times that much once you trans). That's almost 1,600,000,000 exp needed to go from 1 Novice to 99 Trans. Quests might provide around 1-2% of that if you do them all at high levels, but I doubt it surpasses 1% by too much (I don't wanna do the math right now).
Don't get me wrong, I am well aware that it would take literally TONS of work to implement even a bunch of very simple quests to show newbies around, or to help channel exp through things other than griding - but it IS an interesting idea at the very least.
I don't see it happening, though. It would be cool, but there are so many other things Pandora has to worry about, but you never know - maybe in the future? Also, Ragnarok is very openly not a quest-based game. In fact, it is set apart from most other MMORPGs by that fact. It is also one of the only games that has such a steep exp curve in terms of leveling, making questing increasingly less viable to level and mobbing much more convenient. The amount of time spent on a quest is very hard to balance with exp as well, in my opinion.
Anyways, my whole post is fragmented and might not completely make sense - but that's me