Thanks! I will check it out. That bottom-middle camera angle looks good enough for my purposes; maybe not all 10 skaters all the time, but probably most of them anyway.
I think it was at least two seasons ago, but a team or two had implemented an overview/bird's eye view type camera. I think it was the Flyers. You could select it as your camera for nhl.tv, however, there were complaints from fans in the upper decks that it was obstructing their views as it was lower than the highest seats, so they removed. I think it only lasted a few games that season. There's a news story about it if you want to dig, pretty sure the Flyers were the team.
I don't know why they couldn't just raise the camera higher up. If you're interested in doing some sort of machine vision tracking, I think another issue with that feed was that the camera had to pan between the two ends of the rink, so that throws off the ability to just stationarily mark things like face-off circles, the nets, and the boards.