Oh yeah, about the elements thing...true that he hasn't clarified any of it before, but the foundation for that information has been there all along, considering all their nature techniques, especially the big fight between Sandaime and Orochimaru in which all the major jutsus were elemental.

And I guess a person should just KNOW that certain elements are weaker and stronger than others and naturally expect that with the techniques but...whatever. XD

Kishimoto did take ages to finally clarify all of it though. Oh well!! It's good that there will still be new things to learn regarding the way of the ninja! XD