For its MCE, the Stinger could use some upgrades at certain points of its interior (such as the paddle shifters).
Don't expect it to be anywhere close to the K900, but there are certain areas which are a bit too chinzy for its price-point.
The Cadenza and Sorento shouldn't have a nicer feeling/looking steering wheel/airbag cover.
Heck, the steering wheel/airbag cover on the new Forte may be just a little nicer.