The sensor spots in the sky can be corrected. If you have a raw file, you could probably also correct the overprocessing and the "flat" look. But even with a perfect image, you would need to submit model releases for some of the persons in the image. So no, it is not worth to rework this.
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ABAMBO | Hard- and Software Engineer | Photographer
I assume it was rejected for quality reasons, which you should indicate when you upload here for feedback. There are several notable issues: 1) underexposed shadows on the left; 2) perhaps over saturated; 3) artifacts in the sky; 4) a sensor spot / dust spot in the sky; 5) White Balance seems a bit too blue.