User blog comment:B214/DxD Anime gets revamped/@comment-213.120.234.109-20151007121411/@comment-175.142.90.206-20151007125406

FMA Brotherhood isn't done by Toei but that's not the point here. Have you consider the possibility that Toei will change the art style of DxD like they did to Digimon Adventure Tri.

Toei might not want to be compared to TNK thus change the art style and VA entirely.