Way to cherry pick. But if a new player finds 99 levels intimidating they are not really interested in an RPG. You start at level 1, you advance to higher levels, that is the entire point. As I said "lateral expansion". They could start a different storyline that would be a choice at the beginning that would take players from 1 to 99 but maybe in a different location or world with new zones. Current players could pick it up in a slightly altered version. Maybe it would all be from the perspective of someone in the Empire.
There would be a whole new series of dungeons, raids, quests, beast tribes, etc., at 50, 60, 70 etc. This would give people multiple storyline to level multiple jobs through and lead to a bigger more expansive world.