I agree with the concerns. There is a significant loss of soveriegnty and your own control with this treaty as regards both potential defense and resource issues and any nation that can already handle that end of things on their own should think long and hard before giving up that capability to an international committee.
I expect it will not pass in the US Senate for that reason and I expect both Republican and Democratic opposition to keep it from reaching 2/3rd by a fairly large margin. It's an election year and it appears that the conservatives may have the upper hand like they did in 2010. If that is so, many Democrats will not go along with it for fear of having it used against them during the election.