Is that really it? Like, you claim it happens. Point out it doesn't. You assert again it happens, point out exactly how wrong it is, and instead you're like "WELL YOU'RE JUST TAKING IT LITERALLY"
The times they eased up on grinding a resource has always been when it's tied to a power level.
Anima is not. You won't see such drastic changes to it.
And again, never were the changes as drastic as said in the OP, or nearly even a quarter of as drastic.