Sure the goalies are taller, but smaller gear means there will be more net to shoot at than there is currently.
If that gets us to more 6-7 goal games than 3-4 goal games, it's a success.
However, my primary concern is that changing goalie equipment size won't change how the game is played. Sure there will be more goals per game, but does that mean the game gets more exciting to watch? You're still going to have the same "get the puck back to the point, shoot it through a crowd and hope it finds the net" type of strategy. To open up the flow of the game we need 90ft wide rinks (5ft wider), and maybe enforce illegal defenses (like basketball).