155lb is a joke, but setting that aside, let's be honest, how much longer do we think Canelo can make 155lb? If GGG went up in weight or retired, you can bet that Canelo would go up to MW in a heartbeat, because HE IS A MW! Everyone can see it. Team Canelo know that GGG won't go down in weight for anyone bar Floyd, and they are using this to avoid him.
It won't happen, but if team GGG called Team Canelo's bluff , in time I reckon 155lb would be more of a hindrance to Canelo.