another point about the trouble that can make a point.
level 51 ask 562.000 exp, meaning that with this in 1 hours you can get your 51....
let's say you get 200.000 exp from this +the three reward from the series around 50-60k exp.
the FATE repop after 45 minute in this time you get enough exp from the other fate for do at least 100.000 exp... meaning you can get your level 51 in 1 hours... i think is not normal. you can't say this work as intended with this sort of exp gained soo fast.

nothing can beat this ratio exp/time.... impossible!