I get where he is coming from on earth she is limited in what she can do as there is a balance to be upheld, hence why she only limits herself to weather but on Mars there was no climate no weather she creating and molding one from scratch allowed her to do things that on earth she couldn't, such as manipulate season, set up the global ecosystem, marry the heart of the planet along with the earth and sea to form a habitable planet. It is honestly very beautiful. And you notice that her power wasn't just the sky because the description speaks of the planets heart also being part of the process which leads to the ionosphere and the magnetosohere. Also she is setting up what weather is as in its properties and such, this denotes her true power being over the forces and energies that determine weather because your run of the mill weather manipulator can't set up a climate let alone a whole planets climate. Storm was doing sooo much in just that one pannel.