I’m guessing you’re referring to Sigma when you’re talking about turning main tanks into off-tanks? Well, I’ll let you know that Sigma was never a main tank. Even with 1500 hp shield, he doesn’t have what it takes to make space properly as his damage isn’t threatening enough like Winston or Rein’s and he isn’t an immovable object like Orisa
Pretty much the truth. Basically the player base has the bite the bullet. That’s their design philosophy since the game was released lol.
Difficult, but not impossible. The game isn’t that complex. It’s best to try to make each hero viable and let the meta evolve on its own.