The NHL does not need more goals. The number of goals scored is not what makes hockey exciting, it's scoring chances and rushes that make you sit on the edge of your seat. Basketball has a ton of scoring and it's not exciting at all. Lacrosse has a lot more scoring than hockey and it's not all that exciting either because of how much time is spent passing the ball around the outside so far away from the net that it is nearly impossible to beat the goalie from such a distance.
There's no need to make any drastic changes to make the game more exciting, if it wasn't already exciting we wouldn't be watching it.