Exactly, the reality warpers are on a different level cause they don't need to do much to produce the same effects storm, Jean or magneto can. Plus also due to the nature of their powers they can override laws that can make feats difficult, but other omegas have to produce soo much power they break the laws that stands in their way. They can but it will take time hence y storm and magneto had to meditate to create cosmic frets, storm taking out an entire fleet and magneto pulling the Giant space bullet. It's not that they don't have the power to do this big feats but they must collect themselves reach within to perform these feats due to bodily limitations. It is really amazing and very good for plot it limits the omegas while they retain godlike power.