Vex Strike Force event is supposed to give the new exotics, no? It's worked that way for me since it came out (I have all but the newest), but today I got a Khepri's Sting instead of the Mothkeeper's. I did a quick search online, and the last time this happened, a few months ago, they fixed it somewhat quickly, but alas, it's apparently happening again. Bungie! Please, if nothing else, be consistent! When you fix stuff, it should stay fixed!