There's no reason not to have the ability to post, browse or join groups while in game. As it is, we have to use a separate, out-of-game app for it, which is ridiculously archaic. Pure stone age garbage. The other option is to make everything matchmade, but since most don't want it (me included) nor will it ever happen anyway, this is the bare minimum that should be included in the game. Come on Bungie, graduate into the 2000s with the rest of the industry.