Perenial Philosophy

When is this profieciecy/stat going to join the rest in terms of leveling?
Everything else- I fill the bar to green... which ever stat I choose '+' raises 2...and all others that have filled bars raise by 1... but not Perennial Philosophy.
Reverse... increasing Perennial Philosophy only increases by 1 no matter way... and nothing else.
Wondering if it's not time to fix this?
I always thought it a bug before... but as Devs raise us to higher and higher stat levels to earn skills... the chore is more grindy than odious that it was.
What was the reason for separating out this stat in the first place... beyond 'just because you could'?
Everything else- I fill the bar to green... which ever stat I choose '+' raises 2...and all others that have filled bars raise by 1... but not Perennial Philosophy.
Reverse... increasing Perennial Philosophy only increases by 1 no matter way... and nothing else.
Wondering if it's not time to fix this?
I always thought it a bug before... but as Devs raise us to higher and higher stat levels to earn skills... the chore is more grindy than odious that it was.
What was the reason for separating out this stat in the first place... beyond 'just because you could'?