Some would call that give and take.
There was a change of songwriting emphasis a few years back - before Get Ready - wherein Barney would go away and write most of a song alone, bringing it back for the others to add bits to it and generally flesh it out.
This was significantly different to how they did things earlier on where they'd jam for ages and then pick the bits they liked to develop them into songs. Barney's now much more of a solo songwriter than he was before. I suppose writing or co-writing the three Electronic albums has helped that whereas Hooky probably continued to use the old 'jam it for ages and then pick the bits out' approach with Revenge and Monaco.
When the songs get credited to just B.Sumner in future as opposed to New Order, then we'll all know the balance has totally shifted.
Phil's just a hired hand really. I don't think he has any input on the writing side. He's basically a mute human sequencer!