I'll try to keep this short and easy to understand.
It's simply a recap of the first season with a very monotonous voice narrating over it.
I believe that really good anime are hard to forget. Four years is a long time, I must agree, but not merely enough to forget the thrilling experience that the first season offered.
In case you don't remember season one, you're better off re-watching it.
Don't get me wrong, it does what a recap episode is meant to do. However the monotonous narration over footage I remember very vividly and clearly wasn't enjoyable whatsoever.
I don't think a recap like this, merely
recycling footage from the previous season was necessary, specially knowing there will be an enourmous quality drop in the upcoming season.
To me, it's an unecessary reminder that the first season was an amazing, brilliantly crafted show and season two will very likely be disappointing to say the very least. But I'll be here to see once it airs, I truly hope I end up being wrong and that AT LEAST the story keeps me somewhat hooked to it.
10/10 Art, Characters and Story since it's all from season one. lul x)
5/10 Sound. Very monotonous narration.
1/10 Personal enjoyment.
5.3/10 Overall ¯\_(ツ)_/¯