1) That on its own appears to be more range than power, but considering it was like a tiny sliver of the weakened Preservation's power that let Rashek move the planet, it wouldn't be out of the realm of possibility for Sazed to be able to move the rest of the planets at once.
However, I'm not sure if that would net 4-B however, as our typical measurement for the 4-B involves the energy of an explosion large enough to cover a solar system, not the energy necessary to move around all the planets in a solar system. Also, the sun is billion times larger than a planet.
So, I would be fine with upgrading the range and adding a further note to his AP justification about him being able to affect all the planets in the solar system, but not outright upgrading him to 4-B