The figures for passenger transfers, published by the Office of Rail and Road (ORR) last month generally show a slight decline in March 2019 to end-February 2020 over the corresponding 2018/19 statistics. However, Neath held steady (0.7% increase) while Port Talbot Parkway increased passsenger usage by 4.7%. Indeed, Port Talbot has showed a steady increase from the time of the (what many people consider sub-optimal) remodelling of the station completed in 2016.
Incidentally, for those interested in taking an active part in the improvement of railway services in Wales, https://www.railfuture.org.uk/display2552 gives a good introduction to the work of Railfuture. The organisation could always use more young people and more women.