I bought a 2015 that was built later in the year (June 1st) and I don't have any dash rattle. I'm willing to bet it's only the earlier-built 2015's that have that problem.
I have a 2016 GT, just bought it two weeks ago and I have the annoying ass dash rattle. If I put my hand on it the rattle stops, seems like ford should easily be able to find a fix for this
Yeah I wish they put more foam in, too much plastic on plastic action. I drive on some pretty bad roads and my dash rattles quite a bit. The drone from my exhaust also rattles my dash within a 600~ rpm range.
Aftermarket exhaust can certainly exacerbate the situation.
oh my lol, time to wrap the car in foam
The mid piece by the center air vents (air vents and vaccum/oil pressure gage on perf. pack) sometimes creakes. Annoys the f*** out of me but oh well. Luckily no other rattles.