"So far", says the cynic in me.

Ah, but if you embrace your inner cynic, you can find hope for this.

The conservative wing of the SCOTUS hates the idea of administrative power to make policy. That's often cast as trying to curtail the power of the Deep State - which it does. But is also, unavoidably, a statement about the limits of Executive power and the power of the President. Ultimately all administrative rulemaking and policy setting is an executive function, and stems from whatever authority the President has under the Constitution to "take care" that the laws are executed and whatever authority is assigned to him under the statutes.

A restrictive view of what agencies can do is necessarily a restrictive view of what the President can do. If EPA can't regulate power plant CO2 emissions without an express grant of authority from Congress (for example), then DOGE can't change the structure of USAID or repeal the Anti-Deficiency Act without a grant of authority from Congress either.

Trump's only in office for another 3 years and 11 months. The conservative legal project has been decades in the making, and has decades more to go. If you're cynical, perhaps you can see that they have aims and priorities that are independent from (and different from) Trump's - bad and ill-thought priorities to be sure, but ones that conflict with Trump's vision of the Executive as similar to a closely-held family office.