while the above is all accurate, the main reason for the no activity on site is a delay in the funding from CMHC. Dream doesn't want to start until they have the funding locked in.
i beeelieve Dream has delegated authority from the city (means site plan isn't approved yet but it's very close and they can start building)
the Booth Street bridge modifications are all expected to be feasible as it's a relatively new bridge and drawings are available.
another big coordination effort is around the existing LRT retaining wall. the project is going to be extending the retaining wall due to the new MUP running along the north of this site. even though the existing wall is only a few years old, no one can find drawings of it.