Wait wait wait, Late Fall is in 17 months now.
My issue with late fall 2019 is there can be compounding issues with the opening of DL's SWGE that would roll and impact WDW's opening. Plus any additional delays due to weather or other issues in Florida. And when I mean opening I mean the land, shops, restaurants, and rides. I could see them pull a fast one without a ride or both rides and go "IT'S OPEN LIKE WE SAID IT WOULD!"
Also did Throwbridge work on FJ? I thought that was mostly Coup.