The more I think on it, the more I feel Kaladin will die in either book 4 or book 5. There isn't that much character development he has left imo and that is a dangerous place to be for a character. Because of this, he is the perfect character to kill off. BS is an excellent writer and we know he isn't afraid of killing the main protagonist in a series. Sanderson has been lax so far regarding Stormlight Archive main/secondary character deaths - I sense a strong highstorm coming. Kaladin's death would be really unexpected, and it's also needed to forego character stagnation or regression.
Desolations are supposed to be huge disasters that put humanity on the brink of extinction. Having said this, this one is supposed to be worse given Odium's increased influence. I fully expect more than half the cast to be dead by the end of the series.
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Really early to say but my character death predictions:
Kaladin, Teft, Taln, Axies, Renarin, Dalinar, Szeth, Amaran, Shallan's brothers, more of Kaladin's bridgecrew
Those who will survive to the end:
Jasnah (future worldhopper?), Lift, Navanni, Shallan, Adolin, Rock, Hoid (ofc)