Have to admit, its an off road vehicle... lol I think dust wasn't really a big concern at the time of its design, but that being said I also know its been a little much on occasion. I personally found a lot of the dust was coming in through the rear cargo hatch. so much so that the fabric pull down cable for the hatch would turn yellow from all they sand and dust coming in through the little hook it attaches to.
I just ended up making a decent clean job after each trip. Just a part of the vehicle I guess