It will be an interesting debate in the years to come. Where I think there's no debate is that these contact sports contribute to CTE. Were the problems come in is the owners , league commissioners and presidents deny any linkage between their sports and CTE. We've already seen the former NFL players win their lawsuit over the league and there's a current lawsuit with the former players of the NHL and the league and that will be interesting to follow in the coming months and years. In hockey the players of today are much bigger than in the past and there's are a couple of reason's why it's a faster game. I don't believe that the players individually are faster but because of 4 line hockey and shorter shifts,so the game itself is faster. Fighting is also an interesting debate but it is the great equalizer in hockey. Whether people like it or not, it keeps the players honest. I don't think you can take fighting out of hockey, even if the rules dictate it but I agree with you, there will be more and more cheap shots. At this point, the leagues haven't taken it out for a reason so hopefully it will be there for awhile yet . I'm sure other sports like the ones you suggest will at some point follow suit in taking the heat. It only take a couple of ex athletes from those sports to come forward and then it's game on. All in all , the next few years should be very interesting in following this very contentious issue with many sports, amateur and professional .