This makes the game much more exciting tbh, questing with your friends and you get side tracked doing this fun stuff. Awsome.
Would be cool if it was used in a boss fight since mobs don't seem to be chained to areas like most mmos. Have us chase a npc around would be a nice change from tank & spank fights.
I have to chime in on the datacron issue, they are nothing close to this, all of them are either buy an item to access the datacron or wait and do platforms that you don't even have to jump. and they take like no time to get to, just saying.
More on topic, are there any other videos showcasing this kind of exploration at all? There was an awesome blog on Kotoku about how he tried to break the game by trying to jump into the massive hole in Divinity's Reach, but even with the help of a dev playing alongside him, jumping over rooftops and exploring the edges as much as possible, simply couldn't seem to do it, but not sure if that's really the same thing...