Looking at the scenes from Fredericksburg, it seems that a missing pose is the half crouch half run of men advancing into a hail of shot and shell, instinctivly trying to make themselves small. Hopefully smaller than the guy on front!

Not sure if the sculptors intent was to make a coat that could work both as a frock coat and a greatcoat like the Irish Brigade at Fredericksburg, but from a distance and painted in light blue why not? But apparently there are sets with greatcoats coming eventually.

I'm putting the images of the figures here in this thread.