While there are no new details on the causes of the blowout, available information on the possible contributing factors is nicely summarized. The presentation also includes a very good summary of risk management considerations.
Barriers against accidents are not only technical and operational and “physical” but are also non-physical built around strategic and organizational measures and decisions
During the Montara hearings and later in Macondo discussions, we raised concerns about the timing of the production casing pressure test. This issue has not received enough attention in our view, possibly because most of the Macondo focus has been on annulus flow and barriers. It was good to see this comment in the presentation:
Pressure tested well far too early – could have blown out cement of shoe track
Bud's Offshore Energy (BOE) 
Bud,
Thank you very much for this illustrative presentation.
Jos