Frustration

Perhaps we should consider what Odium said in oathbringer, saying he could take away a fused immortality, so this is something Odium can undo at will (maybe). The fused strike me as some kind of pseudo-shard. the only things that might be able to kill them and keep them dead are weapons that in my opinion could kill a shard(I could be wrong). The only things I can think of being Nightblood, Vyre's knife thing, and whatever killed Adolisium. If you can name something else please do.

The ONLY problem with this is everyone sees it coming, unless everyone seeing it makes them think it won't happen and then it does happen and the surprise is that it did! Ahem little rant out of the way I think it is MUCH more likely that Dalinar would become the missing Herald after the one guy died at the end of Oathbringer.

Do you have any evidence to back this up? admittedly aside from that one line I agree he only really seems to cause hate and contention.However he could be where the Passions we keep hearing about came from.

Odium spoke of himself in one of Dalinar's visions as passion i.e. not just hatred. In my opinion an Odium Cultivation cross over is a bad idea and the resulting shard would probably want to grow emotion which would be devistating if he could just grow mistrust among the Radiants.