Several changes to the complete GTFS bundle are being proposed, outlined in the description of the sample data here.
We are seeking feedback by 25/3/2019, particularly on the implementation of the “exact_times” field in routes.txt, which is not exactly to GTF spec.
In a major enhancement, real-time GTFS trip IDs will now be aligned across all GTFS bundles, with the exception of Sydney Ferries, please check it out 
what does “run to headway” mean?
Eg a service that operates every 10 minutes and tries to maintain that frequency even when some services get delayed
so, if one service is delayed by 5 minutes, and a later service is delayed by another 5 minutes, then there’s effectively one less service that day?
Potentially yes
The proposed changes were delayed for a while, but are now going ahead in the export on evening Tuesday 11 June. There’s a full test export available here:
Is bikes_allowed meant to be "" for all trips?
For now yes. It will hopefully be populated at a later date.
Hi @david.phillips this bundle seems to have duplicate agency id’s and trip_id’s, should this be expected in the final version?