One of the really good features of WoW that I actually hope they steal almost outright is the dungeon finder, and if it works like it does in WoW you can just walk up to any dungeon and do it, but only level appropriate ones show up in the finder. I assume there will be some feature where you can level sync with friends and queue or something in 2.0's version of it if it's anything like WoWs.

At the moment of course it's pretty much just speculation as we have no idea how the nuances of it will work.