The experience you reported is a typical description of what normally happens when an engine stalls while the vehicle is moving. When the engine stalls (which can happen if the throttle body needs cleaning, or if the spark plugs need replacement, or if you are using poor quality fuel) the oil pressure light will come on, and the steering will stiffen up; because the engine has stopped, and thus is no longer turning the oil pump or power steering pump.
It is indeed upsetting, and a potential safety issue, that power steering systems only work while the engine is running. However, this is what happens on ALL brands of vehicles with power steering; when the engine stalls. The steering effort on some brands does not become quite as stiff as it does on others; but they all become stiff enough to be frightening.
Nothing that you described sounds like it had anything to do with either the oil consumption you experienced, or the previous problems you had with the steering. And oil consumption of less than a quart in 1,000 miles is indeed normal in many types of vehicles. Many owners expect a new car to use NO oil at all; but the rate at which a vehicle consumes oil is very dependent on many factors. If a car is not broken in properly (by either driving too easily, or too aggressively; or by not varying the speeds sufficiently during the first few hundred miles; the piston rings will not develop as good a seal as they could if the engine was optimally driven during break in. So an engine which was broken in poorly will be likely to use more oil than an engine which has been optimally broken in.
Driving aggressively when the engine has not yet reached normal operating temperature will also create premature engine wear, and increased oil consumption. So will excessive idling, or allowing the engine to warm up by idling, instead of warming it up by gentle driving.
Another factor which leads to increased oil consumption is the use of so called "energy conserving oils." These types of oil, which are commonly recommended by manufacturers; and are in some cases are mandated by federal regulations, have been thinned to reduce the amount of friction they create. But the thinning reduces their film strength, and increases the rate at which they are consumed. The benefits of energy conserving oil typically save about 1/2 mile per gallon of average fuel consumption. But many car owners are now complaining about the oil consumption and engine wear they experience with these types of oil. The dealers cannot recommend against using these oils; but I'm not a dealer...
I hope this helps!!!