I agree. They stated that their ratification was dependent upon their ratifying statement ('by these presents'). ONLY if that is true is their ratification valid. If true, their ratification was valid, and the states retained the right to unilaterally resume their delegated powers at will.
If not true, then their ratification was null and void.
AFTER their ratification came SUGGESTED/proposed amendments to the Constitution.
Unfortunately for your theory the States were explicitly prevented from passing upon ratification since they were REQUIRED to establish conventions of the American people gathered by state. Legislatures were to determine how the delegates were to be selected and after that had NO power over the results.
Our Founders were sufficiently disgusted with state legislatures that they wanted to make sure none ever tried to undo the work of the Ratification Conventions with a state law. State laws cannot affect the Constitution.
"By these presents" is a mere technical term similiar to saying "We hereby show" or "as the following shows" it is not a term of authority or power.