I gave Oathbringer an eight. There were so many things that I liked about it, I will not attempt to list them all. My favorite scene was when Shallan/Wit did "The Girl Who Looked Up" story. I also enjoyed Rock's POV chapter. Along with that, it was also nice to spend time with others POV besides just the main three characters. Finally there were some really good reveals, such as the Oathpact, Dalinar's past, and the secret of the true voidbringers.
My biggest complaint is the Shallan/Kaladin/Adolin dynamic. Shallan and Kaladin barely speak throughout the entire book. Which we all know they have plenty to discuss. Like Kaladin said, last book they had an intimate moment in the chasm, now it is like it never happened. At times they act like they are just co-workers who hang out once in awhile. The resolution to this dynamic at the end was underwhelming. Also Shallan's personalities became tedious as the book continued on and that seems to be not entirely resolved still. Finally points off for Shallan's and Adolin's cheesy dialogue before the wedding. I face palmed after reading that.
In conclusion Oathbringer was a great book, I could hardly put it down except for going to work. This is still my favorite running series and 3-4 years for the next book cannot come soon enough.