@Das Ponto Based on what I've seen, I think Graham and PCL are checking the existing work and fixing deficiencies before handover. It looked like they were doing repairs to the ramp on 103 Ave as part of that.
God knows.. I'm not guessing anymore..lol. If you want to check out what activity is going on from a day to day basis, check out rogersplace.com
shows the Tower B construction zone among other angles of the ICE District with their cameras.