One reseller of the aftermarket assembly got back to me and told me that the steering directed function is not supported. My guess is that all of these aftermarket ones are made by the same manufacturer, because the ads are almost identical.
Regarding replacing with a new OEM assembly for $1200 for the part, the thing that bothers me about that is a) a bunch of us have this problem, and b) FCA has not admitted a problem. This issue is not the same as a light bulb burning out, IMO. I'd be inclined to buy a new OEM one too, even at this price, but if it has the same issue lurking in it and it pops up a year or two from now, I don't think I would be happy. Fact is, going through the effort and expense of putting either a new or used OEM assembly in means that the risk of it failing too is there and apparently significant (looks at the length of this thread). I'd feel much better if MOPAR fixed the issue, and bumped the revision of the part, before I would buy anything.
My guess is that the problem lies in one of those "ballast" modules that someone mentioned earlier in this thread. My son's Audi A3 had an LED strip turn yellow and then go out on his drivers headlight. The problem was a "ballast" module, but you could buy just the module from Audi or aftermarket, i.e., you can fix the problem with the headlight without throwing out the headlight assembly. Why doesn't MOPAR sell this part?
@RamCares, please help?