My only concern with one is that we're giving one private company a monopoly on it. Is that good, I'm not sure but in general it's usually not good for consumers.
Are we giving them a monopoly? The standard was published, and as someone else mentioned SAE is in the process of formalizing it. I also doubt very much that Ford, GM, et al actually negotiated their contracts without some stipulation that there couldn't be a rug pull.