I'm not sure I'd change a single thing about this knife.
My taste in file work has changed, but your rope file work is something I appreciate.
Of course, your rounded spines are also super pleasing to my eye.
I can see why this finish is requested. If I was ordering, I would have a hard time picking between a polished or etched finish, but right now I'd lean toward your dark etch.
The dimensions of the handle, including the but look right to me.