In what way has the new timetable prioritised Greater Manchester?
IMHO because the apparent need to link everywhere with Manchester Airport (and a heavy rail link from Piccadilly to Victoria) has meant spending best part of £100m so we don't have to reverse services at Piccadilly to reach the Airport.
That means squeezing more services over the Castlefield corridor, that means services becoming less reliable across northern England (because linking everywhere with Manchester Airport means that delays quickly spread across the Northern/ TPE network).
That means that the fringes end up losing their services because a minor delay at Oxford Road is the difference between a TPE service getting all the way to Scarborough/ Middlesbrough and the TPE service having to terminate short so it can make up time on its way back to Lancashire (since they can't afford to be late on the way back through York/ Leeds/ Manchester).
The obsession with long distance links means that Scarborough - York (which could be a simple shuttle into the bay platforms at York for much of the day) has become an unreliable service - since we have a timetable that started with "how can we try to squeeze more services through central Manchester" and the fringes of the network pay the price for that. Oxford Road sneezes and Scarborough catches flu.
Similarly, the need for both Newcastle and Middlesbrough to have direct hourly services to Manchester Airport means the nonsense of a 15/45 minute frequency from Newcastle to Leeds/ Huddersfield/ Manchester.
The delays in Manchester aren't so bad because (with eight or nine trains per hour from the Airport to Piccadilly) there are alternative services in the event of a cancellation - but there are no other services linking Scarborough/ Middlesbrough to York, so the effect on these towns is much more noticeable.
The Metrolink network works well because they stick to a few simple routes - they don't try to give every branch a direct service to the Airport or Media City every hour - there are well balanced frequencies with opportunities to change. But instead of taking that approach on heavy rail, we've created a carefully interwoven network of services (to maximise a variety of links to Manchester Airport) that falls apart at the edges when there's disruption in the Castlefield corridor. Mancunians may not notice these delays so much but people stuck at places like Malton will.