Dozy - quick note as I'm on the road - my observation that the PF had the roll under control quite quickly comes from an examination of the roll trace trend - it exhibits increasing stability - the peaks and valleys in a smoothed trace are reducing and do so, (iirc) over a period of about 30 seconds. They certainly get out of hand later on but we're not talking about anything after the apogee. The sim exhibits this behaviour as well...a bit of "chasing the bank angles" as you have put elsewhere, occurs until you get it right - it's PIO but not in a way that leads to a loss of control, and yes, I think turbulence contributed but again, not in a way that should lead to a loss of the airplane. I think inexperience and more than a few training issues, (chain-of-command, discipline, handling, SOPs, CRM) have contributed here - your comment about back-to-basics is, of course, spot on.