Last time I used the Whyalla train, I booked at the station which was open on a single day shift. As the train left at 530am and returned after 11pm, the station staff never actually got to see the train.
Incidentally the train was half full and comfortable with free tea, coffee and biscuits throughout.
After that ceased I occasionally caught the IP to Port Augusta and connected to the bus there.
The station building is no great loss to architecture or heritage. At least the railway remains busy.
Other trivia, until recently, the rails were original 1915 TAR 80# cascaded from TAR upgrades, ironic that all BHP new rail travelled over them.