A few thoughts. I don’t believe that GOAT know about the fail safe. They seem to think it’s some sort of jewel. Will Hook or Reggie tell them what it does?
Back to the remark about Bae/Neal growing up in FTL. He didn’t say the EF. So, was it really an error on his part or is he giving us a huge hint that the curse affected all other worlds in FTL and not just the EF. Perhaps he spent those 150 missing years (time gap between vortex and arriving in London) travelling in those other worlds such as OZ, Wonderland or World Without Colour (as we’ve questioned whether the London we are seeing is from the latter world).
Haven’t really thought this through and just throwing it out there but it does make me wonder.