1. Nice lighting here, but I think a reflector to bring a little catchlight into her eye would have made it even better. Railroad tracks make great (albeit cliche'd) leading lines, however in this case, they do too good a job, and take the viewer's eye right past the subject and to the back of the image.
2. A little loss of detail in the shirt, BUT nice catchlights and a great smile. A little more subject-to-background separation would not have gone amiss.
In 1 shoot from lower or higher, you would have had a more consistent background. Either way the exposure on her face needs to be brighter, let the background go. Try not to crop through the bust, go higher or lower.
2 is kind of an awkward crop, not as good as 1.
If you clip something and it bothers you go ahead and take a bigger crop....like you meant to do it.