What the benefit to have EXP progression like this?
The only reason I can think of is to create the grind wall.
Do you guy have any idea? I am curious here. 
Don’t misjudge me,I have no problem about it, I am just…just…Why?
Well, my guess is that they want to link base level progression with class advancement.
Other then that i see no valid reason aside of some sort of experiment to make progression like this.
I don’t know about everyone else but I find it super satisfying after grinding levels for hours on end and you finally hit the exp curve reset… 
It gives you something to aim for? I like it.
Basically to simulate your rank ups.
You do hit your rank advancement around that level where the curve is reset give or take a few levels.
Its not necessarily they wanted it to be like this.
It’s the level when you get a rank up. So that you can easy get a few skill points for the new rank
Skill points? You will get only stat points from that <_<.
The class exp table is the same type with character exp table
because it looks cool