There are clearly lessons to be learned. FR has reviewed its fuel policy, and we can only hope that Spain will look at the delays that night to see if they could be handled any better.
In Spain's aviation investigation's agency website, there is finally an entry on the 4 incidents on the 26th July (3 Ryanair and 1 LAN -and yet the title of this thread still has it as 4 Ryanairs!)
Anyway, I insist on the LAN A340, which has the following interesting info on it (It's in Spanish, but I translate the important bit:
Analysis provided by the operator identified the engine had stopped due to low fuel flow.
26-julio-2012. EI-EKK. Boeing B737-800. CC-CQF. Airbus A340-300.*EI-DHH.* Boeing 737-800.* EI-ENM. Boeing B737-800. Aproximación al Aeropuerto de Valencia. - 2012 - Investigación - CIAIAC - Órganos Colegiados - Ministerio de Fomento
Just to show that there was a witch-hunt, it was reported in Spanish media that AESA was requiring all Ryanair incidents to be reported at once, and only later changed that to include all airlines.
Yet, publicly they have not even mentioned the LAN incident, but it's welcome that it is included as part of the review that the Spanish agreed to do after their meeting with the Irish counterparts.