If this has been pointed out elsewhere, ignore me.
But if not, then I found a cool thing. Yay!
Also, potential spoilers below. Caveat lector.
~
So it appears that the Lightweavers, with their "strange and varied mnemonic abilities," (WoR p. 566, Kindle edition) weren't the only ones with extra perks granted via Nahel bond that don't involve spren or Surges (assuming that the enhanced memory is indeed caused by that).
Reference chapter 55's epigraph (WoR p. 636, Kindle edition):
Never tells us what they're freakishly good at, does it? But I noticed that the page referenced sounded familiar.
In the previous chapter, that same page of Words of Radiance is referenced. It says:
This seems to imply that the Skybreakers have an unusual ability to distinguish between those who are guilty and those who are innocent. Fitting, as the Skybreakers put the law above all else.