Egwene dying. I have a hard time reconciling things like this that happen because someone deems it instead of it just seeming natural. I mean, it makes sense that someone would be a casualty, but partly due to Min's visions about Egwene and partly because of how it was leaked that Sanderson's widow wanted her to die caused the character death to just seem contrived. It wasn't really surprising however. Once Gawyn went full retard I was almost positive Egwene was fucking dying too.
Oh, and Siuan and Bryne dying was fucking terrible too, though really only because it all happened "off-screen" as it were. They stayed together the entire time, thought that Min's vision had been complete and then they die anyways, but the part that made it stupid was that you see Siuan making a specific decision, then later someones like, yea they totally died man. Would have been better if there were at least a few paragraphs describing their last actions, or the moment when they felt the other died and realized, oh shit.
Lan being a motherfucking badass makes up for it though. Holy shit man.