User blog comment:Alcahona1095/High School DxD BorN Episode 11 Review/@comment-26345952-20150614030006/@comment-1359322-20150614051108

Well lets just say there the good and the bad.

For starters the main reason why the anime can't even be adapted from the LN properly is because the anime tend to avoid giving explanations that can affect future season. They never mentioned the True Longinus, they didn't explain about the Dragon Kings, and just recently, they didn't even mention the name of the Longinus Diodora mentioned.

So the very moment they cut out details, the anime could have never been a complete adaptation.