All this talk of databases, waypoints, EGPWS, safety culture, procedures etc does not detract from the fact that there was no proper two-crew approach brief* that discussed the elevation of Blackrock and how the approach was going to be conducted. This is standard offshore 2-crew procedure.
And this was not an approach to Blackrock as a LS - that would have required such a brief - this was part of a letdown to cloudbreak to get to Blacksod.
Therefore all the talk about databases, GPWS and especially the construction of the procedure is absolutely valid.
Do you include a brief during a procedural letdown to a rig on EVERY WP in the FMS? I suspect not - such detail would be confined to the final approach to the LS/rig itself.