That sounds about right, sad to say. Unless they bite the bullet and do the checks on the six jumbos due soon they will have to drop JNB and change Japan to the 330.
The fleet has been shrinking faster than the approximately 3%/year pilot group reductions, and there have been recent changes to eliminate S/Os on the nearby Asian destinations.
250 pilots sounds about right, maybe slightly more, although I hope that zero is the outcome.
As far as the non-frontline staff go: we have seen burgeoning management numbers for a dwindling fleet in a mature market. Surely they could find a couple of thousand recent hires whom to teach the bitter lesson of QF Kool-Aide?
From a long-time observer of airlines, I cannot see how reducing the business to a few under serviced Asian routes and LAX/JFK will provide the needed international counterpoint to keep domestic viable. On the other hand, I met someone today who has flown Jetstar twice, so apparently it is possible to overestimate the market.