Are people still calling for a Shops restriction or did this blow over? My personal feeling was that blue decks just needed to start playing 8+ artifact hate spells between the main and SB. I think you're starting to see that now.
Take this Grixis Pyromancer deck (6-0 Vintage Challenge Dec 02, 2017): https://www.mtggoldfish.com/deck/847695#paper
MD: 1 Dack Fayden
SB: 4 By Force, 3 Shattering Spree, (1 Mountain)
And this Team Leovold deck (6-0 Vintage Challenge Dec 16, 2017): https://www.mtggoldfish.com/deck/861860#paper
MD: 2 Dack Fayden, 2 Abrupt Decay, 1 Kolghan's Command
SB: 1 EE, 3 By Force, 1 Abrupt Decay, 1 Ancient Grudge
I think Kolaghan's Command and Abrade are underplayed and so are wrath effects.
I also support the Mental Misstep restriction-- to me it ticks all the boxes: (1) too good, (2) not fun, and (3) format warping/homogenizing. But I'm willing to see how the format evolves.