Mine engine brakes, but it's true that it wouldn't be smart enough to engine brake going downhill. This is my first automatic after a couple decades of manual. It would be really nice improvement for automatics.
There are _moments_ where I would like to exercise more control, like the long downhill example or maybe staying in a low gear in bad weather.
But, I'm still unconvinced that engine braking on a manual transmission in a consumer sedan for every stoplight is helpful. Cars weigh a lot, simply let off the gas a few seconds earlier.