The CTS competes in an industry segment known an near-luxury. Maybe you judge it as not so near as GM would think...
Park assist is pretty rare on vehicles sold in the U.S. Although lots of models have it as an option, it is standard on very few. Rental car cos. (and I tar them all with this brush) seldom spend much on options.
The omission of heated seats - by GM as std equipment - then by Avis in ordering - is very foolish.