The only rink specific change I would want to make would be to double the height of the goal. To compensate, the rules of the game would need to change and allow teams to now have 3 goalkeepers - 2 to form the base of a pyramid on the ground and one that stands/sits on their shoulders to try to save any shots going up high. This would ultimately lead to a lot more scoring and hilarity as the top goalie has to knock their teammates off balance going for saves and ending up in a heap on the ground with a large and wide-open net available to the other team. To somewhat counteract this and add even more falling and hilarity, a modification on the equipment side would remove laces from all skates. With much looser skates, forwards and defenders would have difficulty building up speed and could literally have their skates knocked off from hits. A fun time would be had by all fans, though we would probably need to increase team size to accommodate all the new injuries from these changes.