pain in other characters being controlled by the hex (except Agatha, since she isn't being controlled), I wonder if he ends up being the key to saving Wanda an/or stopping the hex.

I need to go back and watch some of the previous episodes before next week. They clearly revealed that Agatha was controlling many of the things that previously appeared to be Wanda - I'm guessing there are some clues to exactly what that is based on what happens only while she's around.