You said your photos were okay to edit, so I did a SUUUUUUUUPER quick one to show you what I mean.
Lengthening the coat was a good move... but it still doesn't do much more to flatter her.
She has a beautiful body shape, as shown in the first 3 images with that dress... but this coat does nothing to show it off.
I think if you tucked in the sides of the coat a bit to give her "shape" again, rather than letting her be a square box, it looks nicer.
Example:
Like I said, that's a REALLY quick and rough edit... and I probably used a higher pen pressure than I should have, because I wanted to do it quickly, haha, but that's the idea.
And it's not about thinning her out... I didn't touch her legs, arms, or *anything* like that. I just "tailored" the coat to fit her shape better.
After all... it's Pin Up... The purpose of that is to *show off* your body... not hide it under a stiff, square, coat.
Of course, again, this is *my* opinion, and as Tiredon says, "Your milage may vary".