I'm not convinced it was an oops. Hamilton was a power hungry twat that tried to expand federal power almost immediately after ratification.

But, the anti-federalists lost the argument at the time. That doesn't mean the argument was resolved completely. It just means the federalists convinced enough people the Constitution was "good enough" for ratification. We are meant to continue improving it.

Now that we know for sure that the anti federalists were right about the necessary and proper clause and the interstate commerce clause we should be arguing for amendments. Convince enough people and it happens.