Really good drawing !! I find it hard to say something. I have an hesitation on the tail, It seems too on the side to be this tense and rigid. BUT drawing it more behind would hurt the silhouette and bending it would lessen the tension of the drawing... I would maybe do it way bigger behind it, but I'm not sure about it.
I'll try something with the tail. Thank you for pointing the tail origins, always good to have an eye out of the box.
Sorry to not be more helpful
Don't be, I struggled with this tail as soon as I landed the poses correctly. I first smaller it and than I tried many things before leaving it like that, but I still think about changing it in some ways. ;)