I agree that the scorebar on NHLN needs to go during live games, whether it's NHL, AHL, the Memorial Cup, World Championships, college, or whatever other games they can pick up. NBCSN has the right idea with putting it up during intermissions and postgame and taking it down during the actual game.
GameCenterLive gives you 720p30 video for both feeds for every game that isn't otherwise available on local/regional TV, NBCSN, or NHLN. Still stuck with the NHLN-crapped-on broadcast of the first game of HNIC and the Thursday/Friday games they pick up, and still no way to avoid 3 of the worst announcing crews in the NHL that inevitably get picked up for bonus national coverage the most (Pens on Root Sports, Wings on FS Detroit, Sharks on CSN), but at least the rest have options. The PQ isn't quite as good as full HD on Center Ice, but the better selection is worth it.