Firstly, I'm not a commercial pilot.
@Contacted
"A new bulletin relating to Thrust Reverser Inner Wall failure now recommends landing at the nearest suitable airfield.
If this particular flight had this problem (since the bulletin issue) then the crew would not have continued to Dubai."
If that is the case then in this particular case, and with hindsight, you'd have to say that return to airfield would have been a good decision (although maybe for the wrong reasons at the time).
I'm curious though, if they had decided to return would they have had to fly around burning fuel for maybe 5 hours? Given that the thrust reverser was apparently affected this could be quite significant no? As the flight was presumably not over any huge body of water, maybe calculating your possible diversions and carrying on with vigilance makes quite a lot of sense?