Once the project sees occupancy it's going cause more overcrowding and congestion in the TTC Main Street Station. Of course we already have that issue sometimes at rush hour.
Aside from this project we also have Linux Condos which will complete in a year or so and there is a smaller Danny Danforth condos too. The 90 Eastdale in future will also have new residents. So all that density will be felt at the Main-Danforth intersection and station will be running out of capacity too soon.
Although some people may take the GO if they are going to Union or on rout to Oshawa, most people will either do TTC or buy a car, and that also means more traffic jams, violations, parking issues, etc.
Some years ago City put in all the bicycle tracks as a new way of encouraging people and also added car parking spot markings. All that is not helping because Danforth Avenue is now a one-lane road with longer bumper to bumper traffic.
The Danforth beaches area was a great place for new people and families to live, work and settle, but gradually turning in to an urban jungle and infrastructure is not keeping up. IMO there should be more train or street car or bus frequency to manage the growth here.