This would be far more successful as a longer piece.though they look good, as many posters say the feeling is quite empty. Each of the stars would make an interesting character if developed more.
The fight choreography is executed poorly by the pop star herself and some others. Visually it is quite interesting in the details of the costuming and sets and some of the weapons. The poor execution makes the poorly blocked and obvious stunt doubles even more obvious.
With some improvements this could be an interesting longer film as we dig deeper into the individual training and then incorporate those scenes of growth into successful combat against less faceless enemies or former friends from say earlier in the film. The key would be the writing of compelling characters to highlight the growth of the main character.
But that will never happen.