Why did my class advancement milestones change?

imBYN

I'm just trying to wonder what triggered the class advancement milestones changes for me. I used to get tons of iso and catalysts from class advancement milestones (9k required to rank and 100%) but now I need 40k to rank and 100% for ehhh rewards.

I'm still in beginner brackets looking at the arena rank points required. Is the advancement milestones now prestige or hero rating based?