@Chase_Dagger Thanks for the kind words.
@Brass-Man I think @diophan's statement should have stated "other Blue decks" rather than just the mirror. When you consider that Pryoblast, Flusterstorm, and Mental Misstep are powerful against not only the Gush (23.5%), but Paradoxical (10.4%), Oath (7.4%), BUG Fish from Null Rod (4.35%), Other Blue decks (9.6%), and Other Combo decks (1.7%), you end up with these cards being good against 57.0% of the field. Taking measures against Shops has much less overlap. Running more lands helps against Shops, Eldrazi, Humans (I actually don't like running too many lands against BUG Fish and Landstill as they have much weaker mana-denial and you end up leveraging the virtual card advantage of a mana-lite build). Artifact removal is good against Shops but I've found it medium against Eldrazi and surprising poor against Outcomes (It's better to stop the outcomes or land a haymaker like Stony Silence than pick off individual artifacts).