Back with another update. It's been a few months, and I have worked through the third draft of Oathbringer. Original draft didn't have a few of the interludes, so I added those in this revision, as well as incorporating feedback from my team and the team at Tor Books. Earlier today, I wrote the epigraphs and the Wit monologue, then polished off the ketek.
The current length is 514,000 words--so around 100k longer than Words of Radiance. Whew! That's big enough that we're not sure if we can bind it in paperback. (We can manage it in hardcover without too much trouble, though we might have to do some old term paper tricks such as expanding the margins.) The book won't be split in the hardcover US release, or in the ebook, but there's a possibility the US paperback might be split into two volumes released at the same time. (As has been common in the UK for all the books in the series.)
We'll see what happens. Next revision, 4.0, is to incorporate Beta Reader comments and to make some tweaks I've been thinking about. This should be the fastest of the drafts, as I don't need to make any big structural changes or write many new scenes.
5.0 (the final draft) will be a polish and trim. Publication date is still scheduled for this November. The US cover came in just recently, so expect a reveal on that soon. Michael did a fantastic job.
As a warning: I'm not going to be able to monitor this thread very well, as I'm off to Europe. (I'll be in Poland, Germany, and Bulgaria--details on the events section of my website.) So be warned in advance that I probably can't post many replies to your questions here.
I'm still making my way through my recent AMA on /r/fantasy, though, so you can pop over to that and read what I've had to say recently.
As always, thanks for your patience. Beta read responses to the book are strong, so I think you'll be pleased with the result come this fall.