Kessler

Kaladin has slave brand - marking him as a cowardly deserter and light eyes = Shardblade I'd say everybody would think, that Kaladin is an escaped slave, who somehow managed to steal a Shardblade, probably by murdering the Shardbearer in his sleep or finishing a gravely injured one on the battlefield. Still pretty unlikely, but what else is there? Stormlight magically healing the brand of release from slavery and not the slavery brand itself?

What if T's capacity to save the world is when he's in the middle ground - decently smart, without sociopathy, compassionate, but not to the point of being unable to make hard choices. Before he went to Nightwatcher Mr. T was one of the rare monarchs in the world, who cared about the people and managed their realms capably. And Gavilar trusted him with the big secret - something he didn't tell his children and closest allies. He was far from powerless - and Way of Kings showed a man can raise from depths of despair to achieve greatness, if he doesn't succumb to despair. Perhaps if T trusted his own abilities - as he in his Interlude - don't underestimate average intelligence. If T had the capacity to save the world from the start then Nightwatchers's boon was much like Wizard of Oz giving brains/heart/courage. And then she added the curse of intelligence-compassion inversion, which T mistaken for the boon.

I think, morality aside, from practical point of view, killing Sadeas isn't that certain to be a positive thing. He's more trouble dead, then alive. I think WoR reveals Sadeas to be a shadow of the man who tried to save his King, when Assassin in White came. For all his words about Dalinar losing his mind and strength, I'd say it was more of Sadeas projecting what he himself been feeling. Sadeas is constantly lying to himself about his motives. He's shown himself to be a coward - sure he used to be a great swordsman, but now he just butchers foes, who can't harm him. His army is ill-disciplined and I'd say half of it would flee at the sight of voidbringers. He's good at manipulation and treachery, but I doubt they'd be very effective now. On other hand Dalinar's position has grown very strong. Three High Princes now fully support him as High Prince of War, his words were proven right, he controls quarter of all shards in Alethkar, captured Uruthiru and he's got FOUR RADIANTS on his side. Sadeas can puff about ''taking it all'' from Dalinar, but just operating the Oathgate needs a Radiant. Of which only Shallan doesn't have personal reasons to hate him. You can't control Uruthiru without Radiants. His chances of killing Dalinar went to minuscule, now that Dalinar has stormlight, and High Princes who would chose to believe his lies (which are obvious, but some Alethi High Princes would just stick their head into the sand, no doubt) could only be cowards or idiots. So Sadeas alive would be a nuisance, which Dalinar would be able to crush. Sadeas dead on other hand would give credit to the lies against Dalinar. If people suspect that Dalinar had him killed, then maybe the ridiculous conspiracy theories he's been spouting could be true. Somebody will step into Sadea's place, he must have an heir (who could be a puppet for Sadea's wife, who'll actually rule). Dead Sadeas could be used to persuade the remaining High Princes, that they must weaken Dalinar to protect themselves and that his talk of honor is subterfuge and he's not above killing his rivals.

I think Heralds are linked with Recreance. They decided to give up and then told KR that the war was won, but they needed to abandon their Oaths and banish Spren, so the Desolations will be ended once and for all. Which is half-true, since it did delay the Desolation, but at cost. Odium took advantage of the event to attack and destroy Honor and after that subtly influenced the world to stagnate and be weakened by constant wars (for example by arranging the Thrill for Alethi).

Yes, the story of Wit seems spot on. I think that's pretty astute observation. If I recall, there is that passage from the prolouge: It appears Szeth punishment was related with Voidbringers and was administered, on the assumption, that they don't exist. And Jasnah & Shallan are convinced, that they have sufficient proof they exist. Put the two together and Szeth might beleive his punishment was incorrect, perhaps he wouldn't consider himself Truthless anymore. And everything he did was just as Wit's story goes. P.S. it makes such perfect sense for Szeth assasination of Dalinar to happen in the Shallan's book. The Truthless and Shallan's connection to the ideal of honesty. Kaladin & Adolin may end up protecting Dalinar temporarily, but I think Szeth would escape and would be dealt permenantly with by Shallan's search for truth about the Voidbringers.