v.166 - Asylum Patch Notes

Kanna: Mana recovery has been adjusted from recovering 50 Mana every 4 seconds to recovering 4 Mana every second.

So now it's 16 mana every 4 seconds. Less than a third what it used to be.
That sounds crippling.
How is this an improvement?
Is that how it is in JMS?
Do Kannas now have to spam that new Mana Balance skill (and HP potions) just to be able to function?

I always thought it was the same as Zero's Time Force but if it isn't then yeah.. hindered badly.