Kidding aside, Sanderson is by far my favorite author, and his fantasy books are honestly some of the greatest books I've ever read. And I read a lot. I highly recommend finishing the Mistborn trilogy, and then reading some more :)
I've made the argument before that A Song of Ice and Fire doesn't have a particularly high rate of character death. It's just that things actually happen in those books. I think that's why they're so loved: not because they're the best writing, or the best world, or the best characters, but because things happen, every single chapter. Character deaths are high per page, but not high per actual story event that happens. In the Stormlight Archives, it felt like after 1.25 books, each major character had had about 2 major plot events. Way too slow pacing for my taste.
He is a great author. I originally read The Wheel of Time, and the last few books in that series were cowritten by Sanderson. They were so great that I ended up buying the first book of the Stormlight series. Now I’m eagerly waiting for the next book to come out in December, but I’m enjoying Mistborn in the meantime.