It has been retired in the sense that this "rule" or "commandment" is no longer needed now that we have the indwelling Spirit.
But now we have been released from the Law, having died to that by which we were bound, so that we serve in newness of the Spirit and not in oldness of the letter.
Obviously (I am not a whacko), I certainly believe that the Christian should not covet. But we no longer learn this from the Law of Moses, we learn it from the indwelling Spirit. I may wish to nuance this answer, so please bear this in mind when you answer. I will give you a sense of the nuance: Paul sees the Law of Moses as highly problematic in virtue of its Jewish specificity - the Law of Moses was given to the Jews and the Jews only. Since Paul sees all humanity united in Christ, he has strong motivation to "move beyond" the Law of Moses.
See above. Same principal.
Never heard this term, but I looked it up and, yes, it appears that I am. But, this part is key:
The distinction between antinomian and other Christian views on moral law is that antinomians believe that obedience to the law is motivated by an internal principle flowing from belief rather than from any external compulsion
I don't follow you. I agree with Paul - the Law of Moses, when it was in force 2000 years ago and earlier, did indeed arouse sinful passions in the Jew.
The fact that you would ask this question shows that there are some important misunderstandings we need to clear up.