This is very unusual. The auto high beams work surprisingly well on my Toyota. For the high beams to turn on automatically, you have to be above 25 mph and not have any tailights or headlights ahead of you. The car also notices stoplights and if cars are at an intersection and will sometimes turn off the high beams in this situation.
The Avalon Hybrid does sort of sound like a quiet razor every 10 seconds when you have the A/C on.
There are two cupholders in the back seat too, with two more in the back door pockets.
For the cruise control problems, remember that you have adaptive cruise control. Like in every car, you have to keep the sensors clean and free from snow or dirt for them to work properly. The sensors are behind the rearview mirror and inside the front Toyota badge. While going down a long hill, Adaptive Cruise Control does use engine braking to keep the car at a constant speed. This reduces wear and tear on the brakes and keeps the car from riding the brakes. Your brakes would be toast if you constantly rode your brakes down a hill often.
AM Radio doesn't sound good ever. Hondas have tinny sound systems in my experience. In every car except our Hondas, AM radio is extra bassy and hard to listen to.
Make sure the instument panel light setting is turned to high.