Charge is the most fundamental quantity. consider a point charge Q to simplify our mental picture: Q will give rise to a Immutable D, whatever material that Q was placed in. E will then = D/ε. Stronger dielectric material will really weaken you E here. However this is not a contradiction to how capacitor works. if you integrate E along some path connecting 2 points, you will get the potential difference between those 2 points. SURE, you can artificially fix E and claim D will vary in different material. to me, it is a misunderstanding how the physical world behaves. I => H or B is muddy in my head. In a coil: Does dv/dt drives ø directly or does V drives I and NI drives ø and that ø will reversibly affect I (with saturation, who drives whom matters) ?