I think certain business plans, eg Southend and Monarch, may have been predicated on continuing near double digit growth in traffic, and are therefore in doubt.
When Jet2 reported recently they did say that while (profitable) holiday sales were going well, flight-only ticket prices were soft. May also explain why Ryanair decided it was cheaper to cancel flights than hire in agency pilots.
I notice that Vueling seem to have dropped Alicante and Rome from EDI next year, and Norwegian seem to have dropped their summer routes from EDI except Barcelona. I think that expectations from several posters that present flight releases are just the start, and more will be added, will prove to be just wishful thinking.