Considering how much I (and many others) love flashback drafts on MTGO - this is essentially flashback constructed! MTGO has tried similar in the past with the flashback gauntlet (you get a random selection of 8 or so top tier decks from a specific era of MTG). In any case, I fully support efforts like this
Seems like a reasonable pile of stats for shops, at least in the SB for the mirror. Four mana 7/7 trample hits super hard super quick, and is significantly better vs Dismember than Precursor Golem. Of course, the (multiple) drawbacks are quite real and the upside of Precursor Golem alongside Overseer/Chief of the Foundry probably edges out bodies like this. Deserves to be tested imo.
Just wanted to add my voice to the mix - Misstep absolutely should not be restricted, its ubiquity is not a bad thing.. but rather like FOW is part of the glue that holds the format together. It makes games more interesting, not less. By punishing 1cmc spells, it pushes players into more unique draw engines, rather than the simple ancestral or mystical->ancestral
If anything, I think the DCI should look at hitting another shops piece, perhaps Foundry Inspector. Alternatively, unrestricting Gush or Gitaxian Probe could be an interesting tack to take, but both lead down a road that I doubt the DCI wants to take
@miketheprof Serenity has a couple major problems, the largest of which is that it blows up all your own artifact mana. The card isn't much of a 5 for 1 blowout when you are nuking 1 or more of your own moxes. Additionally, Serenity is incredibly slow. The current iteration of Shops kills so quickly that a 1 turn delay may give the Shops player enough time to kill you, or else set up Ravager+Factory. A 6+ power creature immune from sorcery speed interaction is surprisingly tough for many decks to beat.
Lastly, when comparing Serenity to other hate cards, it is somewhat similar to Hurkyl's Recall in that it gives you 1 turn to do whatever broken thing you want unencumbered by taxing effects or graveyard hate. There are very very few decks that need a 1 turn window to go off that simultaneously do not need a large base of artifact mana or a key enchantment in play. The only current viable deck that can play it effectively is Dredge or a blue control deck, and the control decks already have effective hate in Ancient Grudge and By Force.
Shops is a great deck anytime you run low on mtgo tix, as long as you mulligan aggressively and sideboard reasonably well its pretty darn hard to lose. I've been running 75%+ over 50+ matches with shops in the comp leagues. Really makes up for incinerating play points on drafts