I find more often then not a writer has a really good first trilogy then return to the series with following books. I loved the first Kushiel trilogy by Jaqueline Carey but could not get far in the first book of second trilogy. The first couple of Shannarra books were good by Brooks then blah same with Donaldson and his White Gold wearer books, first trilogy good after blah, very blah.
I am hesitant to read any more of the Black Jewels books. I loved the trilogy and the world. The world was a middle ages type world like the Kushiel books. If you never read this trilogy read it now.