Why the BLM nerf?

[Louro999]

I don't mind the nerf on Blizzard 2 and Scathe.
I don't mind the fix of double dipping.
I don't mind the fix of double flare.

I mind that MP regen with Umbral is completely screwed. You cannot predict its behaviour.
Sometimes casting T2+F3 is enough to get all your MP back, but most of the time it is not enough.
It looks very awkward and it is impossible to have a rotation with such a random factor that you cannot predict.
This change was not needed and made the BLM job very hazardous to play.

We had enough random factors to deal with, with Firestarter and Thundercloud.