I believe it would not float your boat but then you are on the wrong boat.
I believe I have said this before that prophecy is about things that haven't happened at the time of the prophecy. Also prophecies don't usually come with a date as in this will be fulfilled in five years.
I believe that is less than apparent and comes from a particular point of view not associated with the text.
I believe this presumes much. Christians follow Jesus who is the fulfillment of the law whereas those who say they follow the law do not actually fulfill it.
I believe that paradigm never worked which richly explains why God had to change it.
First of all, let me just say that I've been in both boats and much prefer the one I'm in, thank you.
Secondly, even though prophecy deals with the future, even the future that is covered in Isaiah doesn't allow for the elimination of the Law, which is exactly what started to happen with Jesus and the apostles and was continued in the early church.
Thirdly, why would God absolutely demand that we follow the Law, threaten to punish us if we didn't, and then turn around and say that we no longer need to follow it? Doesn't that strike you as being rather bizarre? That's like saying that there's so much theft and murder let's legalize them. And this makes sense how?
And finally, if you read Isaiah all the way through, you'll note that even at the end of the book God demands the Law be obeyed-- not abandoned. Matter of fact, we are told by God in Torah that if any "prophet" tells us that we need not obey the Law, that is a "false prophet" that's talking.