The 7 movies don't necessarily explain EVERYTHING, but they explain enough to the point where I felt very happy and satisfied with the ending and story that I got.
This one just decides to step its foot where it doesn't belong and stir up sh*t to explain things. Unfortunately, the explanation that I got (to questions that I didn't have to begin with) made the story WORSE... I think the same goes for one part in the main 7 movies as well, and you probably have watched them if you are reading a review of the epilogue so some spoilers:
- spoiler for the main series!: I think I would have actually preferred if SHIKI (male part) had actually killed the people in the beginning like we are lead to believe in the second episode - and it was an inner struggle between SHIKI (male) and Shiki (female) about the right and wrong of murder. Lio Shirazumi would realize/witness SHIKI/Shiki kill people and because of that be inspired to become a murderer himself to I guess, get close to Shiki (This was actually how I believed the story unfolded, It wasn't until a friend said that SHIKI never killed anyone that I realized this). I thought Mikiya Kokutō was referring to the personality of Shiki (female) when he said that she had never killed anyone, but knowing full well that when SHIKI took over, "he (she?)" actually had killed someone.
Anyway, to conclude - The story is better if you don't what this epilogue and thus it's a complete failure in my opinion. The explanation makes the story worse, not better or more satisfying.
