Although it might not be a masterpiece, I really enjoyed it !
This movie is dedicated to the hard fans of FFVII and not the general public who doesn't know the original movie. Reason is : it's a sequel to the game, it's normal to be confused if you haven't played it as it's not meant to explain what happened in the whole 40 hours worth of gameplay that is FFVII.
Anyway, I loved it especially because it gives some sort of closure to Cloud's character arc. I think it was necessary to complete his mental progression : I would've been surprised if he was doing fine after all that happened in the og game.
He could finally come to term with his guilt over Aerith and Zack's deaths.
Apart from this, the music was really nice as usual, the animation really great especially for the released date. I enjoyed it a lot !