Well they outclass year 2 weapons simply because they can be rerolled to make them perfect. It takes away the meaning of finding a good weapon off the start, because you can simply reroll a year one weapon til your satisfied. It also takes away weapon variety because people would infuse there elemental primaries. I personally have a lot of amazing year 1 legendaries but I already know that if I were able to infuse, I'd never use a year 2 weapon