This rumour concerning the future of the FSM role, is simply that, an unfounded rumour.
In fact, in the next year or so, the FSM's will more than likely get a significant payrise, to recognise their management responsibilities. What is almost likely to happen though, is a reduction of the number of crew on board, with a service re-jig to make it work. With average crew turnover at 16 months, which is the same as it has been for 20 years, it is unlikely to mean crew redundancy, simply a requirement to not replace those that leave.