Personally, while I don't think the Pacioritti - Chara case is the ideal poster case for dangerous head shots in hockey, and I think Gary Bettman's statement with respect to the Air Canada letter were extremely foolish and poorly conceived, I welcome the attention that this incident has brought to the issue of head injuries and head shots. If the Chara - Pacioretti incident can become a stimulus for change, then something good will have come of it.
I also think it goes a little bit beyond head injuries. I think the league needs to look at the number of injuries to defensemen. I don't have the statistics, but since the interference rules were changed, it is my observation that injuries to defensemen have gone way up.
I love this game. I love the speed, the intensity, the violent contact and the pace. No other sport can match it. I hope it is possible to make the game safer without removing the factors that make it so entertaining.
Some things that could be part of the solution:
Fines: The maximum fine that the NHL can levy against a player is something like $2500. These guys carry that much in their wallets. A meaningful fine for an incidental head shot should be $5000 and for an intentional (or directed) head shot should be $35,000. If their is an intent to injure, make it $50,000. The NHLPA has steadfastly opposed hefty fines because they don't like taking money out of their members pockets. If they players want to keep the proceeds from the fines, then they should be applied annually to the players revenue escrow fund.
Suspensions: Suspensions need to be more predictable. The current process is too opaque. While it makes sense to evaluate each incident on its own merits, it tends to lead to confusing and inconsistent application of supplementary discipline.
Equipment: While concussions can be caused by a whiplash effect, not just by impact, improved equipment can reduce the shock and trauma to the brain. There are better helmets, an example might be the Cascade M-11, but players don't like them because they are a bit heavier and slightly more bulky (apparently only 12 players are using it in the NHL - one of them being Willie Mitchell). There is also a lot of room for improvement in shoulder pads - the outer shell of most shoulder pads is has hard as steel.
Rules: Finally, the NHL needs to look at where the rules could be tweaked to improve player safety without destroying the game. No touch icing is probably one area. I'm not a big fan of it, but if that is what it takes to make the game safer, maybe we have to go there.
Education: The CHL and Hockey Canada are probably leading the way here, but if we teach players respect at the earliest ages, maybe it will stick.