What happened?
The cool music and jubilant carnage that we've come to expect from the Madness series is as strong as ever. But whatever changes you made to the formula only hurt the movie. Simply put-- it's nowhere near as good as your other movies.
I don't know if it was the bullet-time, the needless intro or the death of the protagonist, but it just didn't work for me.
I can understand why some people would say you've run out of ideas and that your a one-trick pony. And it's nice to see you try and switch things up once in a while. But honestly, I didn't think Madness needed much improvement in the first place, I liked them the way they were.
If it ain't broke, don't fix it.