They have stated that these year 1 weapons won't become useless in PvP. You are free to use any and all exotics that you want in a general sense but as it is, this gets tiring as you said why would anyone use the same loadout over and over again. These same rules should and could be applied to PvE and directly pointing to any other "MMO" class game with a journey forward, advancing into new content, comes better weapons and gear leaving the past weapons and armor were they belong. It isn't that I don;t care to see my past weapons not coming forward with me, I personally want them to, but it is about making my character stronger and having a great journey to this place. A perfect example of this is kind of advancement is in one of them games I play that is a MMO style we have set armors and with these set armors they give special abilities to certain skills although these armors are left with in their place and not rising to the next level cap and better gear comes to use, although these armors have great perks and you can still use these at any given time but the fact remains, with advancement in content comes better weapons, armors, and other things with it such as consumables. Yeah maybe if they did one they should do all but with some it will be great going into year two of this game, you must see it as a whole and not just a puzzle piece. Even when upgrading some exotics to 2.0 they lose some perks but gain others. They are still not the same and with that I want to explore every new exotic and have something new to taste and maybe get something that will outshine the mighty g-horn.