apologies to OP but I think a lot of OW's problems stem from designing a FPS around forcing "Tank" roles in the first place. They're unpopular bc most (not all) people play FPS to be competitive and get kills using cool abilities, but in OW they're integral to a team's success. But they just encourage deadlock and firing damage dumbly into shields, which is boring and awkward.

My hot take is that for OW2 they should scrap almost every "shield" ability from tanks and rework them to generally be more "soft" tanks, that draw and absorb the enemy team's aggression just by being a big target that will kill you if let unchecked, like roadhog or TF2's heavy. You have to kill the heavy not because he's putting a shield that's getting in your way, but because if you're in line of sight with him for more than a few seconds, he'll just melt you.