the best stuff he has ever written and springboards into what promises to be an awesome book 5. There is a lot of sciency stuff going on but overall it's an awesome setup for the finale of the first arc.
I don't know how you can find WoK boring.
The prologue is an assassin killing a king.
The first 7 or 8 chapters are a soldier in the army who has been sold into slavery who wants to end it all. It truly is better on a re read as well so you understand the context a lot more.
And Shallan... yeah I get it, but she serves for some great world building.