Below are three goals, guess which ones were disallowed? If you guessed all three you're right! In each case the referee decided that the goalie had been "interfered" with. We're only ten games in and there have been more terrible calls than I can remember from all the games last season. Instead of ruining competitive games with bad calls why not implement a coach's challenge? I don't see any reason not to. To prevent false challenges you could have a team issued a delay of game penalty if the challenge doesn't overturn the call. And if it does overturn the call, the team would keep their challenge intact (like the challenges in Tennis for an out of bounds ball).
Attempting to learn ice hockey... part time photoshopper... part time memorabilia collector... part time nerd... apparently the GIF master... Go Sens Go!