Great episode as usual. Thank you for doing this.
One piece that struck me as odd was the insistence that Workshop decks don't run 1-mana spells because the right one hasn't come along. There's definitely some truth to that, but there are design and balance reasons as well. Unless the spell costs ♦, any deck can run it. The place where Workshops gains a distinct advantage is when the spell costs 2+ mana, all of which is generic and/or colorless. Spells that any deck can play, like Pithing Needle and Grafdigger's Cage, do little to distinguish the Workshop deck from other decks in the format. I can attest that Mental Misstep is a powerful tool against Workshops - you just need to be in the Dredge matchup first.