1. Alright, from seeing other posts here, I have decided that this really is a rather unpopular opinion: Rlain could not have bonded the Sibling, even if Navani had never existed or had not been chosen. I have come to this deduction by examining all evidence presented in the novel which pertains to this subject. Rlain is an embittered outcast of both the Listeners/Singers and Humans. He lacks the correct personality and manor of emotional damage to bond a bondsmith type spren, as he does not bridge, or unify; he separates; It would require that he be chosen purely because he wasn't human and that he was in the right place, which would oppose his character arc completely and entirely.
Outside of selection based upon what species he is, there is certainly no reason at all that Rlain would be better as a bondsmith than any of the other characters in the 'societal outcast' crowd, all of whom would make significantly inferior bondsmiths to Navani. And finally, Rlain being chosen is exactly what we would have expected to happen (hence some people's disappointment), the general trend in the fantasy genre presently being ridiculously contrasting hero's journeys. The only reason that Rlain would become a bondsmith is because we want him to do so in order to appease our sense of justice, which has nothing to do with the plot or his actual character. And thus, the trick is on all of us, Branderson actually pulled a massive plot twist by not writing one at all.
I also have a personal hunch that at some point we shall learn why all of the Kholins are slowly becoming radiant I'm subsequent novels, but this hardly need be included in what is already a blurb of opinion stretched far too long.
2. Like many others have noted, the nodes are a terrifyingly foolish plot device, highly reminiscent of the 'conquest' mode in the first person shooter franchise 'Battlefield'. At this point is this really still considered an unpopular opinion?
3. Kaladin's depression was not handled with the same finesse that it was in WoK and WoR. It builds to an immeasurable front at which point Kaladin attempts to end it, but then, suddenly, he gets his powers back + shardplate and suddenly forgets that he was just in the frickin' process of killing himself. (Though that Tien seen was touching, I'll admit.) On the bright side, now he may be worshipping Dalinar as God, and I mean, really, why not?