I'm very open to what I can do to improve them. Any suggestions?
Well, some of the things I noticed are, in the first, he's lost his white T-shirt, and the reconstruction of his chin to jaw doesn't look natural, but very flat and square.
In the second, there's a lot of reconstruction work that, again, just doesn't look natural to me. The splotches of lighter or darker colors on the skin of the subjects, for instance stands out quite a lot to my eye. People's skin just doesn't look that blotchy and uneven. The reconstruction of the arm on the female on the left side of the image just doesn't look like a real person's arm proportionally, and many of the shadows under chins and so on don't look right to me either. The boy's cheek looks like a chipmunk's cheek full of nuts - unnatural for a human.
It's sort of like you more often just extended the hues and brightness levels in the original images into the areas that were torn up, even when those hues and brightness levels were actually damage that needed to be cleaned up themselves. In doing so, much of it rendered flat and without believably correct 3-dimensional quality and, in some cases, losing the inherent shapes of the real-world objects they need to portray in a believable way. In restorations like this, you've really got to imagine the original quality photo and really think about how the light and shadow and shape and 3 dimensional depth of everything in it must have originally looked, and try to recreate that.
Sometimes, it's best to bring in body parts, eyes, hair or other things from other photos entirely, and then fit them into the composition appropriately, and adjust them to the correct size, dimension, color, hue, saturation, brightness levels, light and shadow. That's no easy task, but gets easier the more you do it.
What's the length of a typical person's forearm in relation to their head or hand or foot other body parts you can see? (Length of a person's forearm is about the length of the person's foot, as an example) Those are the kinds of things you've got to research and learn about human anatomy in order to convincingly reconstruct by compositing from other source images or rebuilding from scratch the missing pieces in an image like this, where so much is destroyed.
Those are my starting thoughts as I look at the images posted.