It was supposedly to help increase goalscoring, and it was approved of by most of the experts at The Hockey News and the rest of the hockey media. The thinking was "look at how many goals Gretzky set up from back there", ignoring the fact that Gretzky did a lot of things nobody else could, and he never needed extra space back there anyway.
Another of the league's attempts to increase the number of goals but ended up backfiring. Much like their idea of giving a team a point for losing in OT. It was supposed to make teams take more chances in OT to go for the win, but resulted in teams playing more conservative and defensive in games that were tied in the third period, in order to protect the single point.
Exactly. The idiocy was mindnumbing.
"Gretzky creates goals from back there, so more space will mean more goals!"
Completely not understanding that Gretzky creating goals from back there had absolutely nothing to do with the amount of space, and everything to do with his ability to use the goal net as a shield and sucker defenders into leaving their man in front to chase him and then being able to go out the other side.
In the meantime, they decided that they'd deal with the clogging up of the neutral zone by making it smaller and cramming more players into it.
The fact that the people making these decisions had such a poor grasp of how the game actually worked is incredibly troubling.
__________
As for the man in the crease rule, the logic there was equally flawed.
There was a spike in goaltender injuries in 1995-96 and the resulting Chicken Little hysteria over it. So the league had the knee-jerk reaction of the crease rule in order to 'protect the goalies'.
Problem was, virtually none of the injuries to goalies that year were as a result of circumstances that the crease rule would 'prevent'. It was just one of those random things - guys tearing groins doing the splits, Richter had his hand stepped on when he was way out of the crease, and so on. The one watershed event that really caused the rule was Nick Kypreos intentionally falling on Grant Fuhr and hurting Fuhr's knee .... but in that instance the puck was already in the crease and under Fuhr, so if a goal would have been scored out of it under the new rule, it would have still counted.
So we ended up stuck with this idiotic rule for 3 years for absolutely no reason at all. Just horrendous leadership from the GMs and Board of Governers.