I too think this was a ridiculously over the top decision. I'm still unclear whether it was a grade 2 (3 weeks) + 4 weeks for injury loading, or grade 1 (1 week) + 6 weeks for injury loading.
Reading some tweets from people who were in the hearing, the tackle was compared to others that had been charged with grade 2 and "convicted" (ie, early pleas...have to remember, if players take the early plea it means that tackle is a precedent for that charge) and it was very similar. The factors being the leg lifted causing the balance of the player to tip forward and put their head/neck in a dangerous position. And nobody can argue that's what happened.
But a grade 2 is a 3 week (300-odd points) penalty. Which indicates to me they went with 4 weeks loading for the injury. THAT is wrong IMO. I do agree in theory with considering the injury outcome in cases where the act is reckless or intentional AND the act DIRECTLY causes the injury but in cases like this where it was at most careless, and the other players in the tackle including McKinnon himself contributed to the way he fell, that seems ludicrous.
And no I am NOT saying McKinnon is to blame for his injury, merely that it was a combination of factors in this tackle that caused this tragic outcome. And like others I deeply hope his condition improves over time and he gets some normality in his life.
I really think this has set a very dangerous precedent with injury loading. Let's think back to Yow Yeh, and let's say for a moment he was bumped midair while going for that bomb (for argument's sake let's say he was defending, and thus it's against the rules) and comes down and shatters his ankle. Would that player deserve a 4 or 6 week loading for a minor bump in the air? Of course not.
An example where I think injury could be considered is, for example, Luke O'Donnell's spear tackle on Boyd in Origin. And similarly, Inu's on Inglis. Both could've had the same outcome as McKinnon, and both were absolutely reckless and solely the actions of those players.
Considering the injury in EVERY suspension is a minefield IMO.