
Edit: Right, having watched the replay, things I noticed:
1. He secures the middle mass which allows him to go T2. If I would contest the middle mass I would NOT have been able to secure the 4 mexes on the side. By going to the side I was GUARANTEED 4 mexes but if I contested the middle I would likely have ended up with no mexes or reclaim.
2. I overspam power a bit which is an easy mistake when you forget to pause your power spam engy team.
3. The "com expansion" slowed me down a bit, but at the same time I would NOT have secured the side without it since the enemy was streaming units there.