Since this will be buried....
After watching far too many OT games this season, what I'd like to see (since it's not even really hockey to begin with) is only for Regular Season 3-on-3 OT. Once you gain the blue line, the red line becomes the offside, BUT if you purposely play the puck back to the goalie, or skate back past the red line with the puck, you lose possession. No faceoff, the ref blows the whistle tosses the puck to the opposing team, blows the whistle and we keep going.
I know, it's extreme, I know there are a lot of people who will hate it, but it's the quickest way to keep OT moving, and it stops with teams dicking around with the puck for 2 full minutes without a shot.