That looks beautiful.

Regarding addition of possible new elements... IMO, that is at the core of the creation process, which is unique to each person. If you ask that to 100 people, you'd get 200 different answers.

I would not put an angel leading someone up to heaven because I'm not the religious type. But I'm sure millions of other people would be delighted to see that in the image.

There's one thing in your composition that is 'asking' for something. In the upper right quadrant there's an area without clouds. That's an assymetry on what is otherwise a very symetric image, so it 'screams' for something, for some additional element.

That 'hole' on the right has another effect, compositionally, which may not be what you intended: it's an escape route for the viewers eyes. The eyes leave the image through that hole, which is not good. The compositions should, generally speaking, invite the viewer to return to the image, not to leave it. So, I would definitely put something there that would point back to the image, something like a comet or something else that has a general feeling of 'pointing'. Could be the wing of an angel with the tip pointing in the moon's direction, for example. Or many other things.