Tallawong (they changed the name 3-4 years ago) commuters if they travel to central will all clearly get a seat as will the next few stations.Yes and as most people would define a longer commute at 30 - 40min or more, then this not an issue for the Sydney Metro is it?Cudgegong to Chatswood, let alone to Central is quite a long commute. There needs to be a demand for travel between the Northwest and the centre for passenger heavy rail to be viable out there in the first place. In spite of the faster and more frequent services, lower comfort level may well have driven away commuters who are thus car-borne or going by bus.
A more frequent and consistent stopping pattern is quite possible even with double decker trains. If running infrequent double deckers on an adhoc timetable is not as good, then running single decker trains (same length) like this could be worse.
As stated many times and is in a govt documents the Metro line IS NOT your typical sweeper style commuter line where people mostly just board the train for most of the jounery to the city. Rather it has a number of signficant locations where there is a high turn over of passengers.
Spend some time looking at that bording and unboarding data you will see that Epping to Chatswood even before NWRL had for some stations more people getting off in AM peak than getting on and for Epping and Chatswood there is a large number changing trains. Having riden the train in both directions in peak I can assure you the station data is correct.
Your claims that it will discourage people are completely false as you havn't even bothered to refer to the published boarding numbers. The NWRL was prior to CV exceeding expectations with ECRL numbers higher than before after factoring in the extra passengers from NW stations.