Surely the sensible ruling is to say "if you choose to run, jump and or slide into player from front on, even if it is in the instance of smothering, and you severely concuss them, then you are liable for suspension". I don't care if it was a footy act. Bumping was a footy act, and it's dangerous if done incorrectly. No different here. I'm sure he didn't mean for what happened, but I'm sure he tried to hit him.