Ratification of the Law of the Sea Treaty always seemed like a good thing. Both the Commandant and the CNO support it.
I can’t claim to have a full understanding of the treaty, but I have begun to get inklings of why others have reservations about it. As in all things legal, it is subject to interpretation, and the interpretation of others do not necessarily match our own.
In the interest of having a balance view, you might want to spend a few minutes reading what Peter Brookes, a former deputy assistant secretary of defense, has to say about why its not a good idea.
The right of innocent passage seems to be one of the things that is subject to interpretation, and it is not just China and developing countries that see things differently. So do the Canadians. (More here, here, and here.)