I too used to work at Aztec West and was surprised that the nearest station was Patchway. Given the density of housing in the immediate area (northern Bradley Stoke and Patchway) there would seem to be some justification for a new station.
How about moving it slightly further north, to the farm land just the other side of the M5, with pedestrian walkways and cyclepaths under the motorway linking it to the office and residential areas. With it's own motorway exit, it could be become a replacement for the now traffic-jammed Bristol Parkway. Perhaps it could be called Patchway Parkway.