One of the great features of Action Essentials 2 is the debris and dust elements. With the new atmosphere effects in this collection, you will be able to create depth by layering multiple elements in your composite. Foreground dust is one of the best ways to give your audience the feeling of being trapped with you as well as helps blend things together.
Another great side point, is the benefit of using real live action elements with CG ones (like 3d animation). This gives your mind something to look at that IS real and makes the rest of the composite more convincing.
UPDATE: VIDEO ADDED
Here is something you can create in 5-10 minutes with Action Essentials 2. Imagine how good it would look with 17 minutes of work! …maybe fix the motion tracking… nah.