Words of Radiance is one of my favorite books ever. I can't recall ever being bored while reading all 1,000 pages.
I didn't have a problem with Kaladin being emo. It seemed appropriate for his character. Look at all he's been through. I'd like to see anyone who could go through all that and not have some issues.
One of my favorite things about the book was how much Shallan developed as a character. In the first book, I occasionally found her sections tedious. In the second, I loved her character.
I'm excited to read the next one, though I have no issue with Sanderson writing some other projects to recharge. I love all his work.