I would prefer they do update it to be harder level 60 content, not "hard" 50 content. Heck it should have been 1000 runs not 200.
It's supposed to entice tanks for wanting to tank. Rewarding those for actually filling the role.

It's not something you should spend an afternoon spamming turn 4 to complete.

But hey, I've been a tank long before these achievements existed, so maybe I'm jaded.