I've rolled one to a good set number and found one with a good set number and neither gave me the pricey cards so I stopped. Can go either way, I suppose. If people like to roll them then more power to them, i'm definitely not one to criticize where and how people spend their currency considering how much I spend rolling items.
Funnily enough, I found more of the unique diviners in delve than I did regular diviners (3 vs 2).
I wonder if GGG would ever consider letting scions pick 2 ascendencies from the same class, like elementalist/occultist or raider/pathfinder etc. Would open up some more interesting builds I think (for 6 points same as it is now to get 2 of them).