As expected of the NRL, the only precedent they end up setting is "as long as you are a bankable superstar, we will give leniency"
If I were to give leniency (which I wouldn't in this case cause the action was far more deliberate), then the send off would reduce down to 1 week.
Citing someone for a head-clash is wild. Very dangerous precedent to set, to back up a call that was dubious at best.