BUGx is doing well because people are trying to run KarnForge obviously. It is essentially a bye for the BUG deck.
Why that calls for a Mystic Forge/Karn restriction is what does not make sense to me. What's "overpowered" in the context of Vintage? It just doesn't exist. Karn doesn't win and therefore it shouldn't be viewed as a problem.
Asia EW has 5 unique decks in the top 8. There's nothing to complain about. I'm going to play regardless of the decision reached by the DCI. I play everyday anyway, but I think it's pretty fun that the meta is at least a little different right now.
Like why is Mystical Tutor-Tinker-Bolas totally fine, but Workshop, Mox, Mystic Forge is some scary thing that people can't handle. Blue can have all these avenues to do whatever they want and as soon as Shops as something reliably decent, it's a huge problem for the internet.