It depends on what the source is for the dust and debris. If it is from front blow out, adding a catcher vs just letting the clippings fly is not going to help. If you have a lot of dust in the discharge with the clippings, the dust is going to go through the catcher holes and still be a problem. We do have a dust cover kit to prevent this as an option. I believe we are the only catcher manufacturer who offers this.
Cutting grass with a powerful mower does move a lot of debris around. I don't think this can be completely eliminated, unfortunately.