I like your deep exploration of upgrading weapons as we build names for our guardians. I also really liked the thought of finding a blueprint for an exotic weapon and questing across the galaxy to assemble it. Maybe that could be one of the limited time events that bungie has been hinting at? That being said, I don't think that every weapon that you find should have the potential to become exotic one day. I feel like some of the magic of having an exotic weapon would come from the fact that it's not familiar, or normally available. I think that upgrading your favorite gun would be amazing, but I also think that it should stop just before exotic. Maybe there could be another limited quest where you could turn a piece of armor, or a gun into an exotic. Having to choose only one thing to ascend to an exotic level every once-in-a-great-while could make the choice feel more meaningful. One way or another it's all exciting think about and I can't wait for the beta!