it seems most likely that they were short on power on final
of course they would be since they descended into the water.
What counts is why
too slow a spool up vs descent rate? ala Capt Asseline ?
dual engine powerloss on landing ala BA B777 ?
commanded power not sufficient to achieve the runway?
I haven't seen a hint of facts to support any of the above scenarios as yet.
Anybody seen a peek at the condition of the fans on both engins Asymetric power ? undamaged blades?