Okay, they did add another Barrier to the game in the form of Sigma, but with 2-2-2 it’s basically impossible to have more than 4 barriers (one of which is an Ult and another of which is a tiny 200HP thing) in a team at any given time (plus Ice Wall, though I’d debate if that counts as a barrier.)
Hell, Sigma didn’t even add anything new because people could’ve/can still do Rein+Orisa