Yeah if we just get private matches then everyone will complain about not having control over certain settings. I don't see it coming until destiny 2. It would be pretty complex. There are so many different player traits/modifiers in destiny compared to halo 3. Also it's a little different since players have their own weapons. There would have to be some way to create a separate loadout for the custom game. Ideally it would be super in depth. It doesn't need to include every single gun but rather just a generic one of each type and it would let you pick the archetype and any weapon perks in the game. Your character needs to be completely separate from the custom game characters. That way you can control things like which classes are allowed and which subclasses can be used and what perks within the subclass can be used, etc.