I think you received update 2 around the same time MS started rolling out the win 10 mobile preview right? If that is the case then I can tell you that you were one of the lucky ones. Not a lot of people received update 2. There is good news; MS is rolling out update 2 to more and more phone so, sit tight I guess.
If you really have your heart set on update 2 then I would say, look into flashing roms... However, if you have no idea what that is, don't try it