Just took a walk around Union (the Danish pastry House needed me!) and can report:
In the York moat they have now basically finished the tiled floor in the east part (nearest the building) and closed off the western part and are clearly getting ready to do work there.
In the west Front St moat they have 90% finished the dropped ceiling that runs immediately adjacent to the building and seem to be working again on the external doors (the southern one remains closed).
They are installing more stonework at the top of the escalators that go from Bay concourse to/from the main Union Station.
As noted above, by
@unicornsample , they have installed signage in the currently closed off section of the Bay concourse and it looks as though they could be getting ready to open a passageway through it leading to Maple Leaf Square and Scotia Bank Arena (doing this would seem necessary before they (Metrolinx) move to fixing the west Bay teamway.) They will be moving to fix (waterproof) the whole of the Bay Street bridge and teamways once they finish working on the York ones.
In the east Front St moat the floor seems to be 100% completed but a section at the stairs to the tunnel and at the bottom of the east stairs (to Bay) is still blocked off. The stairs at the at end are almost done but the north side of them is still closed off. They seem to be working again on the external doors that lead to the Bay St moat.
In the Bay St moat they have started getting ready to lay tiles and have put up 95% of the overhead glass - only the section near the Bay west teamway remains to be done.