With figures you're damned if you do and damned if you don't.
I think your figures look fine but I suspect that the railway figure sculpting that most (7mm) crews rely upon is not as good as it could be. That said the Phoenix figures that (I think) you used seem to me to be amongst the best in 7mm, although looking through the range there is some difference in believability, different sculptors I guess.
In 1/32 and thereabouts we are very lucky with the Preiser stuff, military @1/35 and Phoenix again, although I rejected their loco driver in favour of the milkman figure, which is much, much better.
Perhaps someone ought to send an emissary to the military modelling world in search of new sculptors...
All that said, an intelligent choice of pose and suitable grouping, and of course the painting, make a huge difference.
On balance, great pictures of lovely stock and I'm definitely in favour of more little people - I knew that they were models anyway
Simon