I'm a recent fan and discovered I enjoy the worlds. I find them engrossing. imo Sanderson could cut down 10-20% (Rhythm of War in particular suffered from length). But, I did appreciate his own defense of length in the genre.
https://www.tor.com/2014/03/04/words-of-radiance-and-the-art...
His insight seems to boil down to
1. Treat it as multiple books if you prefer. 2. "I get the chance to write what I enjoy. I understand it's not for everyone. That doesn't bother me."