Unfortunately the most rational answers i can come up with for you are ones that might be a little cold/ not good enough. Just talking about year 1 weapons, they did it purely from a design perspective. That perspective being that creating new year 2 weapons will create a new arsenal that current invested players will have to adapt to. It refreshens the weapon meta from year 2. It also gives them room to start making a new arsenal of weapons without having to constantly consintrate on everything. Im sure you've heard this before however so let me give you the other, colder, reason. Because they can. And they did. You asked Bungie was to give you a good reason as to why they left year 1 weapons out of year 2. Im sure that their answer is that they dont need one. You have to think that they have already thought this arguement through. They had to think about it in one capacity or another. They didn't just arbitrarily decide to do it this way. Am i saying to just blindly trust them? No. But i am saying that most of these decisions are probably just as heatedly argued about in the development team. These are actual people making these games. Not just heartless machines. I guess what im saying is to keep speaking your mind. Keep arguing and keep beeing passionate. But try to understand the perspective of the devs as well. Most of what you are arguing has been said a thousand times over in house. So make a better arguement. Keep voicing your opinion. But try to understand EVERY counter arguement.