http://m.imgur.com/a/vyXEi
DRK and WHM concept art for 3.3
When you said nerf I thought you meant in power.
Yeah zodiak was nerfed in 3.0 when it became completely irrelevant and for glam only. The anima is already puss easy to get, even easier than some of the nerfed steps of zodiak, so I don't see any nerfs coming.
I managed all my crystals in about 10 hours of fate farming, the dungeons took 4 hours and that was with 1 friend. I had my 200 anima the day the patch dropped, and then my 210 I got just by playing the game normally, trading allied seals, law and poetics for unidentified items, doing my beast tribes and daily treasure chests. There's no real way they could nerf it, and the only conceivable thing I'd see is making unidentified items available from more sources.