So as it turns out, playing the punching bag isn’t really fun for most players and led to there being very few tank players in queue. Removing one remedies this.
The problem is now, despite removing a tank, there’s now once again very few people queuing for tank.
Either way, one tank on each team doing the job of two tanks needs to be buffed to compensate. Tanks have to be strong by design or they become afterthoughts and not tanks.