I also think Oathbringer's pacing was pretty bad. In fact, I thought it was worse the 2nd time through in my recent reread. It made up for it in other areas, though.
And I actually think that a big part of the reason the pacing felt like it dragged to me in RoW is exactly the reason of what you said makes it good to you the conflict being stretched out over 3 entire parts with no real major developments that changed the nature of the conflict absolutely killed the pacing of the back half of the book. I feel like nothing at all happened between the beginning of part 4 and the ending in terms of anything actually changing. I mean obviously there was a lot of development for Venli, Navani, Raboniel, and the nature of stormlight, but otherwise nothing happened. It was like an entire half of the book was nothing but the Shallan chapters from Way of Kings, instead of having those broken up by the more exciting Kaladin and Dalinar chapters. The only 'break' where something seemed to have actually happened was Kaladin doing another fight for a tower fabrial, but aside from the glove thing being a weird kinda interesting gimmick, it didn't actually progress anything either- it was purely a fight to maintain the status quo.