Storywise, at first you might ask as to "WTF is this" until you watched it from start to end, one would find out how it turns out, really kudos to studio Lerche and creator Kodaka, Kazutaka, so for such plot, cu'z of it's deceptive nature, really has to be a "Very Good 8."
Artwise, it was a mediocre 5, given that there wasn't any changes at all with the character's illustration and don't expect any fanservices around here.
Sound, it's a 5 in my book , since it was still them same seiyuus who did the voices of the characters and I just have nothing good or bad to say about it, PERIOD.
Character, I'd say it was a good 7, to allocated the slot to Nagito, Hinata, Fuyuhiko and Souta, but I'm kinda a bit disgusted that Nagito's has been downgraded as this jinxed guy who is a bad luck magnet, but still his role wasn't that bad.
Enjoyment, it was a good 7 in my book, but not very good since at frist one might think that this special is a "WTF" and imo, it should have been added to the Mirai-hen, and not be made as its own special, then again..............................
Overall, it does deserve some very good credit, for Kodaka, Kazutaka's creativity for playing us audience were at first we might think it's a PTW, but in the end it was worth watching after all, so Overall it's an 8.
Fu,Fu,Fu,Fu,Fu,Fu
