JES: why not
Sorry to disagree, but what is the purpose of PP if not to discuss.
Pax Boy: that's a good list, and I totally agree.
Ability of divert to support aircraft pax and crew is vital if the problem is not a fire ball en route to earth.
Also if an ETOPS flight, then en route alternates are designated. The airline also has an agreement with the alternates.
The weather at the various alternates is relevant, and not know at present.
Glf