Well, it's all confirmed now that Fastjet is moving its HQ to Johannesburg and the A319s will be gone by the end of September to be replaced initially with 3 wet leased from Bulgaria Air - though it is planned that this will change to a dry lease in April 2017 by which time Fastjet will have its own crews for the type in place
https://skift.com/2016/09/23/the-dre...ine-is-fading/
It will be interesting to see how well the type fares in competition with ATCLs new Dash 8 Q400s as they come into service in the next couple of months