I ordered one for myself for my 2015 and honestly with the pressure cap from factory and the tight seal door I don't see much trouble from what they went to.
What Ram should have done is made the door lock when shut. Then have a fuel door button inside the cab. Dust hasn't been the issue so much as having no way to prevent someone from contaminating.
So, stuff a heavy rag in there to keep the possibility of dirt/dust contamination down.
Then you'll have something for when you invariably spill some fuel.