You want one reason? 1.) everything from year 1 has been reskinned and is available in year 2, with some variations. And these variations are based on a lot of data and forces guardians to accomplish NF, raids, etc. a differently. It's no longer hand cannon based. If you'd like a second reason... I'll provide you with one too. Burns. Posts have been on here that there's been a lack of the cool burns primaries use to have. Only 2 year two weapons have it and they are both exotic and arc. And both being exotic, is pretty taxing because it would be nicer to use an exotic special or heavy. (Still waiting on exotic ghost with life exotic. Just throwing that out there bungie). My answer to legendaries not having burn- they gave us a third subclass. You are still able to apply all three burns if you needed to.