There are natural limitations on the amount a team can rotate. Just because Collingwood is trying to make an example out of itself today, doesn't mean that their tactics are a) necessary or b) long-term. It's hardly an issue, but the last thing we need is extra substitutions - with short list sizes full of inexperienced youngsters, we don't need another one or two of them missing out on experience by playing "twelfth man" as it were.

Too many unnecessary rules complicate the game. Just let the coaches use however many rotations they feel they need to win the game.