I believe that flawless raid challenges should be in the seals but they should be implemented in a different way. Instead of having to do the whole raid flawless in one sitting, they should change it to be like the subclass challeneges in the raids. Basically you can do the flawless challenges by encounter instead of the whole raid. I think this would be a neat change, i know people who already have Rivensbane may not agree but let me know what you think.