The whole reason FFXI had Merit Points was specifically because the level cap was stuck at 75 for something like 8 years, so players really did need some way of "breaking their limits". FFXIV on the other hand, has it's level cap raised ten levels every two years when a new expansion pack is launched so this is currently not necessary.

No doubt it is something SE could look at when we inevitably reach level 100 or so, but until then, it's not really needed.