I wasn't really happy with the amnesia cliche at the end. Felt like a cheap way to move forward past previous fluff.
Then again she was in emotional turmoil and attacked by a spirit, who kinda looked like Ko. (I let my imagination go to not get upset over it)
Not to mention Unalaq chilling in the Spirit World for whatever reason.
This season is definitely pulling a lot of "you didn't expect this bad thing to happen" along with various anime cliches. I hope the seasons get more involved and slows down a bit with the next episodes.