It’s pretty common for new rules to be applied in frustrating ways that were never intended. For example, the above could‘ve resulted in Jack Riewoldt getting removed in the last quarter of the Prelim.
Adding an emergency to your own team looks to have less grey area than removing a player from the opposition team to level it out. Something should happen though. We were lucky Vlastuin’s concussion wasn’t the difference in deciding the premiership.
I agree its far more equitable to replace an injured player than it is to remove players from the other team, sort of an eye for an eye. Don't like it. Much prefer a sub rule.
Easy way to stop teams manipulating it, is if you are replaced in the team due to the injury sub / subs then you become ineligible for the following game. That will remove all the rorting immediately.