Why would you want workshop in that deck? We have already established that the card is not good enough for existing shops lists right? So now we are talking about what decks could play it, and blue came up, but if your in blue isnt this just better? What other cards would a blue deck run that justify playing shops. Your playing the moxen already, you can play academy most likely, but if your in blue you probably just want trinket mages with all that jewelry in your list, forces, tinker, a blight steel, blue power, and thirst. If you want 5 angels maybe, but I doubt you want that.
You wouldn't want a workshop in a blue deck. You wouldn't want that blue creature in a vintage deck. The only reason you would use a 4/4 beat stick for 4 in vintage is because of workshop and a good ability.