Where do you get those stats? I see on overbuff that Hog is picked way more than any shield tank “this week”. Do you have more specific stats that are just since the patch? Zarya, Hog and Ball are the 3 most picked tanks in higher ranks “this week” and Zarya and Hog the top 2 down to Gold. Is there another source of stats?
In the games I played, which are only around Gold, the tanks were Zarya (90% of games I would say), Hog (maybe 70%) and Ball or Rein with the ocassional Winston for part of a game, but never the whole game.