Machinehead
GoAwayBrady
Get rid of the shootout. Just play 3 on 3 until someone scores, it won't take long. They're both wacky as hell and crappy ways to end a game, but a crapshoot is better than a cointoss.
Get rid of the offside challenges, this is the worst crap I have ever seen. Kill the flow of the game and get rid of good goals because the rules must be interpreted literally? Screw that.
I'd like to at least have a shot at real overtime first, but yeah, if nothing comes of it, I wouldn't mind just doing 3 on 3 until there's a winner.
Like you said, I can't see it going on long, and they play double, triple overtime in other sports (or 18 innings if you will) and play the next night.
Plus, since it's 3 on 3, it won't ruin the mystique of playoff overtime.