User blog comment:B214/High School DxD Hero Discussion/@comment-31718363-20180411005401/@comment-28884330-20180411015543

It had to be "redone" because BorN fucked up a lot of things that will cause problems later on if not addressed with a retcon. Besides, what you are probably complaining about is the artwork, not the animation. They are completely different things. Artwork is the drawing, animation is how the drawings "move". In terms of animation, while this episode took a fall in quality near the end, it was all around much better than most individual episodes of BorN (if not all).