So, let's start from the top. Where I circled in blue, where the wings go behind the back to connect blah blah, those aren't even nor the same shape. Now, if the wing is folded I can see what you were trying to accomplish, however, they appear to be unevenly placed and unevenly drawn, which throws off the perspective/pose. The thinner line on the left side (character's right side, but if you're looking at it, left side) that is the 'top' of the wing differs from the thicker line on the other side, causing the wings to appear to be growing/placed in different places on the character. To the best of my knowledge, wing bones on the top that connect to the spine/shoulder idfk where they connect I can draw it just don't know the name are almost always even + they don't bend; wings bend at the joints, and that isn't a joint right there, that should stick straight out idk how to explain it very well but I hope I've explained it well enough?? I'm one step away from being autistic so forgive me.
More on the wings, since the rest of the body is symmetrical, they should be the same size and shape; however, if trying to display foreshortening, the wing farther away should appear slightly shorter horizontally but not vertically. This doesn't really work with this pose though, because the pose appears to be drawn facing head on. The straight horizontal purple lines mark the hips, shoulders, and where the wing tips SHOULD line up. As you can see, they're slightly out of balance, and it throws the whole image off.
Where I circled in green, the gap between the arms and the sides, that looks more like blank space than the wing; what you needed to do was add a line or two there, just to define that the arm IS overlapping the wing, and it'll take away the appearance of it just being empty space.
And then in orange, the feet. So, first thing you can do to fix them/show they're not just a blob is add a white line (or colored/black line) to separate them. It can be thin, I showed an example to the right. But! As you can see, they look pretty strange with a quick orange outline; you don't have to be an expert or super detailed to draw feet, especially when it's stylized, but you do want them to look like they're physically able to support your character standing. the placement of feet show the distribution of weight on the character, and what angle they're standing at blah blah. Since this character's body suggests they're standing straight and looking at you head on, the feet should be symmetrical, flat on the ground, and pointing forward; when they're twisted to the side like that and overlapping each other, they will automatically look WEIRD and like they don't belong to the rest of the body, and cause the whole pose to look off. To the left I drew a little example of what the feet could be doing; you also want to put space between the character's feet. The way legs work is they're not directly against each other, and there should be a bit of a gap between the feet when a character is standing flat on their feet.
And then down below, I drew some very rough, very basic sketches/outlines demonstrating the line of action and how it can completely change your character. Poses should express the character's personality, and the more dynamic/curvier/asymmetrical something looks, USUALLY the more intriguing it is. From the left to the right I curved the line down more and more, and it can DEFINITELY be curved much, much more. When stylizing art, you want to go almost extreme with your angles and your form; you want to fully express the character.
Following my own advice, I drew a *very* rough sketch, it kinda sloppy, but just changing a few things and keeping it from being symmetrical can bring a lot more excitement and personality to the image. I tried to keep some of the stylized elements but I fucked it up, but I was just trying to do something really fast.
Also, when going for a symmetrical look, it's best to go completely symmetrical with maybe one or two details different; otherwise it looks more like you rely too much on copy/paste versus trying to make an aesthetically pleasing image. Your second drawing is nice to look at with the symmetry because it is completely symmetrical instead of being even in some places and off in others.
You also want to keep an image balanced! With the hair and halo on one side and not the other, that side looks heavier than the other; one thing you can do when drawing to defeat that, is add an object/blob of color on the other side in roughly the same place so it looks like the image's weight? is evenly dispersed.
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