In the limited way that the delegates are allowed to vote, if their vote affects the outcome, they the vote will be thrown out, and another vote will take place with those whose votes really count. Basically, for those enamored with the flashiness of having American greatness and democracy flashed before you eyes, we have moved from not having a vote, to having a vote that doesn’t count!
Democrats made this change initially in 1993 and Republicans challenged it in court, lost, but removed the rule when they came into power in 1995. Democrats vowed to bring back these symbolic rights if they regained the majority, claiming that they only want to spread a “sense” of democracy to those who are already American. Republicans have vowed to once again take this issue to court, asserting that only those who are truly American, meaning pay taxes or have at least 650,000 people in their districts should be allowed to have a voice in Congress.
Although we generally tend to think about discussions about Guam's political status as divided into two positions (those who heroically and patriotically want the status quo against those who maladjustedly and crazily advocate the island's decolonization), there are in reality three basic positions one can take. You can either want to move close to the United States or further away, or you can take the position that Guam and Chamorros are fundamentally inferior to the rest of the world, do not deserve to be equal among states or nations and should remain a colony.
If you are one of those people who believe that Guam is nothing but a backwater colony, a strategically important dot on the map until the rising tide of global warming swallows the island up, then the recent gift of this symbolic vote in Congress is something worth celebrating. If however, you are serious about Guam's just or ideal future being closer to the US or further away, then this voting rights issues should make you sick to your stomach, it should make you feel outrage and anger.
If you want Guam to move further away from the United States, and want our relationship with it to be less paternalistic, patronizing and exploitative, then this change is an obvious drawback. This change, the symbolic vote, while meaning nothing in terms of our power in the governing of the United States or determining its policy towards Guam (we are still just a lobbyist with no money), will have huge effects on the pysche of Chamorros and others on Guam, in making us think we are more American than we really are, or that Americanization or more America (in whatever form it is perceived to be) is the answer to all of life's problem.