Ok, so if this is like my '06 expy limited, I don't see what the big deal is. Yes, I was a bit miffed when I tapped on a spoke only to hear a plastic sound. But, from a distance you can't tell they're plastic.
Ok. in the interest of full disclosure, I did replace my stock wheel and tires, with aftermarket 22" wheels.
In either case, the pics looked like my "old" 06 expy limited wheels. I'm guessing you paid the extra $$ for 20" wheels, not so much for the Chrome. But, if you really don't like them, have the dealership put some "stock" wheels on, get back some $$$, and go out and buy some "real" chrome wheels. they're not that expensive, and they look much better than anything Ford can put on them.....
Good luck.. but, really relax a bit. Gonna send your blood pressure through the roof.
later,
Breezyjr