As you know, Parkinson's disease does not affect the muscles per se. Muscle control, yes - the brain becomes progressively less able to control the muscles adequately. But the muscles themselves remain strong with no loss of power or true paralysis, though some strength is often lost as a consequence of lack of exercise. Eyelid drooping is not uncommon in parkinsonism. The symptoms you describe fit the description of fluctuations in the motor response to the medications.
Foot dragging, freezing, and so forth, are all appropriate symptoms.
Parkinson's disease changes with time. That is, the medications which once worked well don't work at the same doses with the same time schedule after some time. However, in general, a patient successfully treated for Parkinson's at the first stages will still be able to benefit from medications as time goes on. It just gets tricky, with motor fluctuations and side effects. You are welcome to ask for a second opinion.