After watching the video, I agree with the suspension to MacArthur. I didn't see either of the Malone or Neil hits.
I do think that the league needs to take a harder line on embellishment / diving. While hits to the head are a concern for the health of the players, diving is an embarrassment to the game. Didn't they have a rule a few years ago where dives were reviewed, fined, and a list was released? Did something happen to that? I don't think suspensions are the answer, but maybe fines and actually having the NHL post some diving videos on their website? Would shame actually work in this era of instant media, particularly if the NHL was the one behind posting it?
Wow, look at me - I'm rambling.