Skyslave,
Given Hellas Jet crews have been trained and flown for a large part of their carrier on a procedural environment. Also Greece has a collission free atc history despite adopting Radar separation some 5 years ago, and having to cope with very heavy traffic between Europe and Middle East and Africa.
I fail to see how Hellas Jet pilot messed a climb clearance particularly flying an A320.
Happy new year with health and money .
Rwy in Sight