‘‘High tier dive’’ Just say Tracer.
Oh wait, just saying Tracer destroys your entire point, because the issue is a lack of Tracer counterpicks and not a lack of peel options.
Half the heroes in the game can peel, Tracer being a poorly designed hero allowed to exist without counterpicks and being resistant to peel doesnt magically mean anything other that Tracer is the issue.
Ironically, all the heroes you are moving to tank are quite literally destroyed by several heroes who are also kept mostly unviable in GM and pro-play.