yes, Sydney is massive. don't worry about an outer Sydney map, there is not much out here. well there is me.
i have reviewed the map on page 2 and i agree with the post about Mascot. it gives the impression of being two separate terts with that pedestrian crossing. if it was one tert you would not be crossing.
you have the same design issue with the City tert where Pyrmont would be but because of its small size and the placement of the army circle on the same side of the crossing as the tert name it does not seem to be such an issue.
if you changed the road to an underground for Mascot & City like you did for the Airport it might work, not 100% accurate but ....... although it might be soon for the City as council plans were unveiled for consultation last week to put the western distributor underground.