Well, on the plus side, you change location every 5 levels and get to "experience" new Fates and areas. While when at 50 you get to do same 2-3 instances again and again and again (let's say AK/Castrum for tomes + Coil...the incentive to repeat the primals is minimal). And even Coil is not really something to write home about from my understanding (as in, you get to idk turn 4, and you can't go to previous turns anymore before reset...so god forbid you don't have the exact ratio of healers/tanks/DPS in the FC + number of members that can do it divisible by 8).