Too bad, I really enjoyed how Shohreh Aghdashloo portrayed Avasarala, she made that character so much more interesting than it was in the books originally.
I agree. I'm very happy I picked the books up only after watching S1 - that way, my mental image of Avasarala was sourced from the books, and all the lovely lines of that character were read with Shohreh's voice in my head.
She is, but somehow it really came to life after I've seen Shohreh Aghdashloo character. In books there's a lot of other powerful characters Naomi, Amos, Miller, Fred Johnson, but IMHO in series Avasarala totally steals the show.