It's been my experience that most transatlantic flights have been full or close to full since May. Business class, while normally quieter in Summer, is still doing very well.
Most upgrades are people using their points or Economy being oversold and the lucky few being bumped up.
As to the report, when you consider its targeted audience i.e. Staff and Pay Tribunal Chairman and its " leak ", I would suggest its conclusion was written first then fleshed out.
While it does contain some home truths, don't expect the end of Aer Lingus soon.