I'm not too keen on losing the xp gain, and I'm assuming this also means I have to unlock the weapons perks again. It would be cool if there was a second set of perks to add to what the weapon already has (if we must lose all the xp earned). Also, a requirement to upgrade an exotic item should be to have it maxed out. I am pleased that I'll be able to bring my favourite weapons out for the new raids, although I'm hoping there will be something similar for legendary items. The other thing that worries me is; what if I take the time/materials/glimmer to upgrade an exotic (icebreaker, g-horn, vex) and once it's maxed out in its upgraded version, what happens if it gets hit with a big Nerf because of whiners from pvp? Somehow they have to figure out how to completely detach Pve/pvp. Oh, more vault space and remove the glimmer cap!