These are adorable, so well made and stitched! Why you even need critique on these I don't know. Great job! (Don't know what to say for originality...) If I had to offer any advice, I'd just suggest going for a darker color on the thread of Luna's wing... and maybe making the smiles a bit more curved. I think they're absolutely great, perfect, and well made. I like how you did the wing detail, and I like the way you did Celestia's hair, with the colors sewn together really well. They're so cute as fillies! I love the eyes, too.