I don't doubt second degree is probably what this is but second degree is too hard to prove. I believe in UK Law (though I could be wrong) if they charge him with second degree, he can't then be found for manslaughter instead so they have to charge him with the most likely to be proven and that's manslaughter.

I played hockey growing up (Canada) and I can tell you he most definitely meant to hit the guy by sticking his leg out and bouncing off the incoming check. It's clear as day to anyone who has played hockey what he was attempting to do. Did he mean to clip him with his skate blade specifically though, that is up for debate. I personally think he meant to hit him with his blade because of the guy's race and history on the ice as well as his reaction after his blade connected. BUT I still think that's a stretch to prove beyond a reasonable doubt. Manslaughter though I think is proven without a doubt.