The Power grants a speed boost and we all have peak reaction times, so it may be extra reassurance that nothing will interfere.

That I'm uncertain of. The sensation is similar to an electric charge, but it has properties that cannot be explained by conventional scientific laws. That leads most people to classify it as magic, but it may be something not sufficiently understood. I'll need to study it when I can.

That may be a technical limitation or a desire to make sure the audience notices the Zords and subsequently buys the toys. But they always arrive quickly---we'd be toast if they didn't.