Currently Bungie doesn't want the Year 1 weapons (and their high base stats) to trump over the new balanced gear. The year 1 weapons were seen as too good in every department when Bungie wanted players to have strengths and weaknesses in their weapons. After all, most guns take skill to cover their weaknesses and harness their strengths. After Bungie gets the current META close to balanced again, there will be more skill play involved with weapons rather than "crutches." P.S. I realize I was confusing on the explanation, basically Bungie likes the idea of having high effectiveness in one category but giving up the strength of another. The year 1 weapons were more well rounded and didn't fit this type of weapon idea that they had in mind.