I do have concerns Northern is trying to become this inter-city service at the detriment of commuter stations and passengers in an effort to improve profitability of the franchise. The imposition of 'skip stop' services to maximise capacity is now widespread with irregular calling patterns on many Northern lines.
tbtc hit the nail on the head very well a couple of years back on the pitfalls of a Northern Connect service.
Northern should be focusing on bread and butter commuter revenue that feeds into long-distance connections from major rail hubs - rather than competing with TransPennine Express as an inter-city franchise. There is some logic to some longer distance Northern Connect services - less need for connections, improves capacity by using less units on separate routes etc.
I can only speak from the line I live on that the timetable changes in May 2018 were mostly all detrimental. Half hour interval at **:00 and **:30 to irregular intervals at **:00 and **:13, extension of service to Liverpool which has reduced PPM punctuality to <50% from 90%, removal of late 90s EMU and introduction of dirty 1980s DMUs for new service to Liverpool etc.
That's not the service passengers want. Northern have to be careful they don't kill the golden goose in the process. The fact that the franchise has not increased passenger numbers since commencing in 2016 is little surprise and a serious cause for concern.