All platforms appear to be totally straight, unlike say Chatswood where P1 and P4 are curved, due to lack of space.
The extra distance from the end of Down platforms P3 and P4, may (cannot be sure) allow a simultaneous moves for
* A Down train entering P3/P4 from Glenfield, while
* A Down train leaves P4/P4 for the sidings.
This has been observed by chance a P3/P4 at Chatswood in the Up direction. One would have to cite the locking tables for the interlocking to be sure. The merging crossover is about 200m past the platform, giving a 200m overlap for the train entering P1 when another is leaving P2.
Having four platforms makes the layout very flexible, and of high capacity. Trains can stand for length periods in the platform with minimal delay to other trains.
There is at least one speed board in the picture, but it is too hard to read. One hopes that they are about X80 so that trains in or out of the platform waste no time slowing down for the turnouts.
The wide track centres between P2 and P3 (perhaps 5m - 6m) instead of 3.66m at say Kogarah allow signals on the ground and not on signal gantries. These wide track centres also create a safe zone for rail workers to stand no matter whatever trains are moving about.
This picture does not show clearly enough what proportion of the platforms is covered by awnings to shield passenger from the sun and rain. How many seats are there?
The OHW masts are not as nice as those through the platforms at Chatswood.