There's never going to be unlimited OT in the regular season. We don't need a winner every single game. It's good that it's unique to the playoffs. The disparate schedules of each team mean that the random instance of a multiple-OT game could have overly negative knock-on effects for teams that are in a dense segment of their schedule. Should upcoming opponents benefit from a team's having had to play 80, 100, or more minutes the previous night? And there's a possible (though unlikely) farcical situation where a team that doesn't really need a win decides to score on themselves to end the game rather than log a bunch of extra minutes for an uncertain outcome. It'd be a rational but deservedly unpopular action.
Now, a system that would have the positive effects you cited above would be to get rid of the shootout, limit OT to 10 minutes (and go back to playing it 5-on-5, for God's sake), and rank teams only by wins in the standings. Ties would be tallied, but not worth anything. The standings columns would be wins, losses, and ties - no points. Most wins, then fewer losses if wins are equal, then whatever tiebreaker comes next (head-to-head?).
This system could be implemented without any other rule change, and immediately, teams would start taking more risks to gain offensive chances, leading to the appearance of more space since teams wouldn't be hunkering down as much. I think the most beneficial change would be near the end of regulation in a tie game: teams sending out their most talented forwards and d-men to try to win the game then and there. A loss is a loss whether in OT or regulation, and a tie's about as good as a loss, so...just go for it. No holding back. 10-minute overtime periods under a "win-only" system, at 5-on-5 nonetheless, would make for amazing highlights. Even if nobody manages to net a winner.
I like the cut of your jib.
Unfortunately, this will never happen. The NHL loves it's Sissy Point because teams winning percentages are artificially inflated.
In a recent season, I believe it was the Avs brass that bragged about having a 90-point season.
Meanwhile, they had less than 40 wins and were 13th in the Western conference, missing the playoffs.
It's a way for ownership to sell their fanbase that they dressed a winning team.
Just look at my pathetic Detroit Red Wings.
They had 79 points, but "Hey, we were only 3 points under .500 everyone!!!"
But in reality, they were 9 wins under .500 and only recorded 17 regulation wins out of their 33 'victories'.
Think about that peeps; 17 'real' wins in 82 games. And they were only 3 points from a .500 record.
And that's why the NHL is way too defensive today. Jeff Blashill (and he's not the only one) went into every game playing for OT. "Lets get that sissy point boys and go home and kiss our sisters!"
If there were no ties, games would look infinitely different.
I also understand your argument against extra time on ice over a long, packed 82-game season.
But honestly, I really believe that once that crutch is removed from the table, coaches will make sure to come out guns blazing.
Baseball isn't nearly as physically taxing as hockey (duh), but they play 162 games in 190 days and are forced to finish each game.
I'd just love to see what coaches like Blashill would do if they knew they had to finish games.
BTW, another change I'd make is reduce the schedule to 70 games and start in mid-sept.
Now there's lots more down time, you can get in full games, and the Cup is hoisted by May 24-weekend.