Veg is 100% right on this one.
Bigger rinks slow the game down and take away from scoring.
Bigger rink means players have more room to back-up when they can’t decide what to do with the puck.
There is less incentive to forecheck because they’ll just back up, and if you chase you’ll just be out of position when they attack.
Defending players are taught to not pursue a player if he is outside of the face off dots. Doing that creates lanes and wastes energy.
Bigger rinks do favour speedier players, but they also favour players who benefit from having more time (players with worse hands, and players who can’t think the game fast enough), so it doesn’t necessarily add to the skill.
It also hurts the ability to generate offence off the cycle. Once you do the work on the boards and beat a guy, you’re further away from the net, so the rest of the defending team has more time to react and get in shooting lanes.
Think of it this way: the scoring area remains the same, but now there’s more perimeter to work with. That doesn’t help with scoring.
I like that it would reduce injury. But the pace would slow down.