The other, far more important trick, is the editing down of action sequences. TM2YC's idea to trim down the action to only the sequences that involve Superman actively trying to save people was brilliant in its simplicity. Not only does this make the film less tedious and less loud, not only does it change the tone of the movie without ever needing to actively change the tone of the movie, but most importantly it creates a bond between the audience and Superman, the hero. It's that lack of a connection, this alienation, in the theatrical cut that led so many to blame Superman for the destruction of Metropolis. By keeping the action focused on Superman, no matter how loud and violent it gets, you invest in the character and his struggle to stop it all. It doesn't matter if he often fails, what matters is that all you see is him trying.