One can see machinery on either side of the ramp that leads to the station.
Furthermore, the Halifax and Alpha entrances to the Mall have also been closed to vehicles and pedestrians.
The Brentwood Mall website has the following map showing the available entrances to the Mall site:
The only accesses are just north of Halifax between Halifax and Brentlawn and the existing entrances on Beta Ave.
Speaking of entrances, in addition to the future light-controlled intersection at Alpha and Lougheed, it appears that a new tunnelled entrance is in the works. A section just east of Alpha has been marked off with rounded sidewalk corners on either side of what appears to be a future tunnel entrance into the mall site.