Dunno if you listen to the Greetings From Storybrooke podcast, GoldenKey, but their podcast for The Queen Is Dead is titled Johanna Did It because one of the hosts thought she was totally shady. Bill’s mentioned his crack theory in a couple of more recent podcasts too, mostly joking about it, but part of his brain is still holding onto the belief that Johanna was bad.
Dunno that I buy into it personally, but still, you’re certainly not alone in your Johanna suspicions.