I said A-level. Go to the US Championships in Minneapolis, or Eagle River in Wisconsin. Last time I played in Minnesota, we got knocked out by a team with 2 or 3 former major junior players, and at least one who was a former ECHLer. All were in their 20s and 30s. And that was the damn C division. There were former AHLers and NHLers in the A division. Phil Housley has played there. John Madden. Ryan Malone. Bunch of others I can't remember. The speed is fast in A. But the pace is screwed up, because the transition game is nothing like normal hockey. And, most importantly, there's nothing that shows it would even increase scoring anyway.
Bluelines do much more than create "pressure points." They dictate the structure of the game, from transition to pace to physicality, etc. You're not realizing how much you are changing the game by removing the blue lines. The ice surface would effectively be drastically expanded, without actually making it bigger. It's not feasible. If hockey ever went in this direction, which it won't, it would have to be some kind of compromise. Stagger offsides (puck has to cross the red line before the player crosses the blue line or something), or bring back the two-line pass, or whatever. Something that wouldn't so fundamentally change the game.
Changing the size of the nets is less drastic, but also really stupid.