Review of High School DxD Hero

I’m a great fan of the DxD series, and the first 3 seasons are amazing: full of passion and love. The best of this genre, and much better than the similar themed “Dakara Boku wa, H ga Dekinai”. But this fourth season is a disaster. The budget was visibly cut down, and the production was shifted from the Studio TNK to the guys of Studio Passione, and as a result the animation and art style was changed and the quality also dropped considerably. Something else was lost in the animations and art style, and that is the more mature and dark eroticism of the femalefigures of the previous seasons. The story was rendered faithfully, but this one was also the weakest part of the manga, and that did not help.
I consider this fourth season not worth watching. This anime is a classic and I loved it, but sadly for me it ended with the third season.