Morgan, you always seem to find justification for not suspending players for their offences, but as we have seen the be nice approach doesn't work, NN should have accumulated enough points under the old system to be given weeks a couple of times, but he keeps getting let of or not even cited. As for the charge, copied direct from the MRP report.
Nic Naitanui, West Coast, has been charged with engaging in rough conduct against Karl Amon, Port Adelaide, during the fourth quarter of the Round Seven match between West Coast and Port Adelaide, played at Optus Stadium on Saturday May 5, 2018.
So whether the tackle was legal or not does not come into it, by the way Amon picked up a loose ball from a ruck contest and had not taken a mark. After watching a couple more replays, I think he was very lucky to only get a week. In the rugby and league codes that would be worth 3 or 4 weeks, and League especially is not noted for dishing out suspensions for nothing offenses.