Until VFF is shut down, or another buyer takes over from Bain, as some would look into their perceptions of them (Bain), I would continue to use FB.
Good way to keep VFF points from going into the "never never".
If Bain one day decides to close VFF, I would still use FB, but probably would put my points to getting $10 off per 2000 FB points.
Right now, VFF is offering 25% bonus for transferring hotel points to VFF, but no sign of the usual 15% bonus for FB points transfer to VFF, that usually goes with the hotel bonus offers.
FB also allows a miniscule VFF SC earn for buying stuff from Coles, for now, its a good thing.
Edit: I don't think SQ would be interested in the FB tie in, EY was a partner a long time ago, but they dropped their liaison with VFF, or did VFF drop them.