I don’t disagree with much of your post, and I appreciate your cautious optimism, but the reality is that major changes (via legislative bills passed by Congress) to the decades-long buildup to the federal bureaucracy would most likely get a veto from the Executive. The number of votes to override a veto is 60 votes in the Senate, and there aren’t enough Senators to override a veto.
While it is true that Congress can do some things that some of us would view in a positive light, I don’t see how a major dismantling of the alphabet agencies (EPA, DOE, etc) can take place as long as the Executive uses his veto pen.
I tend to believe that the long-term answer to bringing the country back closer to the federalist principles underlying the original Constitutional Republic is through a “limited agenda” Convention of States approach.
This is just the laying of a foundation. The work has begun.