Insufficiency of rafts...
Am I right in concluding that there were nothing like enough rafts for 155 people available, or at least in good reach of the overwing and front exits (I have read the posts and understand that the rears could 'possibly' be brought forward)... ?
A surfeit of rafts would seem necessary, as if something 'can' go wrong, it will...
A mile out to sea and a very different story standing on that wing for even 30 minutes!
Remember the Titanic ?