The point is not the gimmick but something extra to reduce the responsibility and pressure for the 1 single tank. I remember from the devs announcement that they want to make OW2 less team-oriented, and I really hope tank could enjoy the game just like the other roles — less pressure on what they pick, less pressure when they die, less pressure from counterpick, etc.

Though, I have absolutely no ideas about what it could be. But it’s definitely something there to allow the single tank to “help” taking space instead of being 100% fully relied on.