I don't like the new rewards for the raid bosses.
Getting clan soul frags from all levels before was good - to me they are more useful than getting the norse god frags as they give you ironite.
Fighting Amaterasu and Cernunnos and mainly getting norse god frags to me is not worth the effort. I have all the Norse god characters and over 1000 frags of each spare to use for sands of blood.
I guess that most people who will be killing Amaterasu X and Cernunnos X will be experienced players who are in a similar state.