I have a feeling -- not being a lawyer and not intimately knowing the US Law -- that the whole legal structure of the Federal Government will soon experience a tremendous shift. Alphabet agencies will stop having any kind of authority that the Judicial Branch never approved of. It will completely shatter everything we know about the feds, from drug regulations (FDA et al), to communications (FCC et al), to stock market (SEC et al), to worker/consumer rights (FTC et al), to immigration (USCIS et al)... There will be a period in the US history where no lawyer will be sure how anything can be relied on anymore because there will be this giant free real estate the Judiciary Branch can make precedents on whenever they want.
When congress passed laws to create these alphabet agencies, they thought they're assigning some amount of authority to them to "regulate", and they thoughts these unelected bureaucrats making up laws -- instead of the glacier slow Congress -- will let Congress off the hook. But they didn't realize that the Judicial Branch would ultimately see it as an existential threat to them -- because the authority to "interpret" law belongs to the Judicial Branch and not the Executive Branch -- and thus by doing so, they actually wrote a blank check to the Judicial Branch (ruled by another set of 9 unelected High Priests) to eventually determine all these things for the Congress. It's gonna take the Congress an unprecedented megaproject to take these powers from the Judiciary and exactly define each law as elected Congress sees fit.
I hope I'm tremendously wrong, but I'm expecting Armageddon-level legal change to soon follow in this country.