This is a personal observation of mine, but I have noticed a trend in explorer areas.
Older explorer areas when you got to a certain point on the explorer map, it gave you the xp and recorded the spot as being explored.
Right about the time Cannith came along things changed and instead of walking into the spot on the map, you now have to find a tiny little disc or scroll or circle or snowflake and click on it.
Personally, I liked the older version better, but I enjoy the additional lore (and voiceovers!) that come with the newer way of doing things. What are your thoughts?