Lol.
Well I do have my current mix of ideas on mostly the same subject.
Balancing to solve "Rein or Lose"
Mostly, changing 2 unpopular heroes, and two abilities on heroes with overloaded kits, and making all of them more desirable for middle ELOs. Would be enough to clear a path to fix Tanks.
At the cost of probably causing about 0.1% of the playerbase to quit. (Which is a bargain compared to the passive quits from not fixing Tanks and queue times)