I'm sad to say, but by turning every cave, crypt, and creature hole in the world into an instanced dungeon, they've kind of screwed the exploration aspect of the game. Exploration was honestly better in 1.0 I feel.
Yes, ARR makes a lot of improvements over the previous, but now the game kind of feels far too arcade-y. Queue up for a dungeon, get thrown in a group, fight stuff for an hour, get loot. Rinse, repeat. I know this has become a staple of MMOs as of late, but those other MMOs still had places to go that weren't instanced dungeons.
It's not even just dungeons. NMs have been reduced to repeatable FATE missions now also. What happened to just chancing upon unusual critters out in the wild?