Good photo. I'd like to see one of a section JUST before it's poured, though. I think there's probably more steel in place at that point.
Still, looking at this, it's easy to see how they could have installed hangers at this point, or at least hanger anchors. I mean, it would be a regular grid, so it could have been dealt with in the support under the rebar used for pouring.
Amazing that they didn't do this, it seems to me. Bad engineering...no question about it.
There was no coordination on the early sections. They designed the ceiling independently from the tunnel roof.