Thank you for putting this data together. This information is vital to showing R&D what's going on.
I agree with @BobbyVictory. I put in my top 8 player profile that Misstep needs to be restricted. It's super oppressive. Right now cards like Goblin Welder and DRS are laughable. If you were to somehow figure out a tier 1 deck that leaned on 1-drops, then everyone would just pack 4x Missteps and knock that deck back down to tier 2. A reason why Dredge and Workshops are so dominate is that they skip 1-drops better than anything else. The only reason blue can sometimes keep up is that they can slam a one-card win condition (Oath of Druids or Monastery Mentor).
I also think that Workshop needs a restriction. It's the Birthing Pod problem: Workshop only gets better with each set. And a restriction does not neuter the deck (unlike Bazaar in Dredge). You can definitely win plenty of games without Mishra's Workshop. If Workshop was restricted for this event, I would still play Ravager Shops. The creature suite is just that solid, and you can still skip 1-drops better than most decks. If Workshop and Misstep were restricted, then I think we actually have an interesting and diverse format again. I'd probably still jam robot beats, but that's just me.
If they decide to not make any of those changes then at least bring back Thorn and hit Sphere. Restricting Thorn really hurt a lot of the fringe Thalia decks. Sphere is only playable in Workshops.