I don't have any problem with the battle sequences (as it takes place in another world so who knows what the laws of that world are.

But what I think really brings down this film and why in the end it would get no higher than a grade that is just above average is the poor character development for all the new characters (which the movie is pretty much based around) and all the choppy story sequences.

The various scenes do not flow very well together at all in Advent Children and when you look at all the new characters that Square added in for this movie it becomes painfully obvious that they are familiar with creating characters for 50 hour long video games and not 90 minute long movies.

All the new characters were very poorly put together. And it might not have been that big of a deal if they didn't put so much focus on them and instead focused in on the characters from the game that were already developed. But the downfall of this movie is the fact that they chose to put the focus of the story onto those poorly put together characters.