I received mine last week.
I haven't had a chance yet to thoroughly test it out (this weekend certainly though) but first impressions are very good.
With the 14mm, 23mm and 35mm I am already a very happy camper and the 56mm in January will hopefully be the icing on the cake.
For me personally Fuji does not have to go FF. I see very little to no advantage. It is pretty perfect the way it is.