I love the 90’s anime but still I didn’t want Crystal to be a sequel to it. Adaptating the manga story was fine with me. It was the poor animation that made me cry, more than screenplay or plot choices. After Mars episode I was so shocked T-T.
I think the realization was not very inspired, but once again it’s the Dark Kingdom arc and it was done in so many format so many times... it’s hard to be original. Weirdly I didn’t think the shitennou thing was so bad (besides the way they die lol).
One thing I had pain with Crystal S1-2 was the way they used shadows, this soft edge brush make all kinda blurry, it wasn’t a good choice IMO. But even in S1, some episodes animation was ok (the maskerade or Serenity’s awakening one, even if style was different from other episodes). I liked S2 better, besides animation I enjoyed seeing a story that was really different from the 90’s anime.