Reading these articles is always interesting. The only thing I hate seeing over and over again is the "Gush needed to go" and "Wizards did the right thing restricting Gush" blah, blah, blah. We should just drop that already. The only reason Gush was restricted was AVAILABILITY. You want to know why there were so many GAT decks in the Top 8 of those tournaments you list, because it is a lot easier to build than a Rector Trix deck or a Stax deck, PERIOD. You don't need a full set of Power 9 and / or Workshops.
On one paragraph you say that GAT was being hated out and the metagame was shifting at the time, but the right decision was still to restrict Gush, then you go on to say that Rector based decks are being hated out so it's okay for the card to remain. I give you the Fact or Fiction paragraph:
Quote In retrospect, this was probably caused, in no small part, by the lack of innovation in Type One in the United States at the time. Most of the top American Type One players were fervent adherents to Keeper. There was little incentive to change and most Keeper player essentially took the myopic view that it "Is the best deck, and the best deck that will ever be."
Guess what, it was these same people that are responsible for axing Gush. I think everyone has their opinion on the matter and that is fine, but don't kid yourselves, the only reason some things don't get restricted is availability. The environment was fine with the presence of GAT and it's still fine, it's just been deprived of a couple of good archetypes. Collateral damage, please, Turbonevyn had been abusing Gush FOREVER, and that was fine.
I hope the environment stays as diverse as it is now. If a set of Workshops was as easy to come by as a set of Gushes, I can guarantee we would all be playing with only ONE Workshop by now. END RANT.
Otherwise, I think it was an excellent article