Wiz
We should keep hold of them, seeing as the 345 is the only aeroplane on the Warzone Fleet with an acceptable/saleable cabin layout, but from what I have heard (from a man who should know) the 345 WILL be gone by the end of this FY and the 4 remaining 343's will stay, meaning there are enough 340 guys to see it bow out in 2017.
The 332 Luxe Liners, after putting in magnificent service as the most capable, adaptable, beloved aeroplane in Emirate's history, are expected to be largely gone by the end of 2016 (and entirely gone by 2017) and the 350 wasn't actually due to arrive until 2019 (according to Airbus' press release). That means that they must (should?) have had a plan to fill that time/capacity gap with 777's or 380's and the 350 cancellation should be an entirely separate matter to the fleet drawdown, even though that sounds a bit odd.
However, there is a rumour going around that the 380 is about to become the subject of another maintenance issue, this time to do with doors or something. That's not official, but if it were true, I'd say they'd try to keep the 332's on in preference of the 340's due fuel burn, especially if pax aren't on the thing for more than an hour and a half at a time.
But that's this week...