As it is now, you accrue Achievement Points as you complete achievements, however while you can gain things from the achievements themselves such as items and titles, there is nothing gained from the amount of achievement point that you have acquired.
In Guild Wars 2 players would unlock bonuses, such as special weapon skins, when they reached certain amounts of total achievement points.
I feel that FF14: ARR is perfectly setup to do something like this and could gift the achievement hunters with some extra stuff as special titles and glamour gear.