If Floyd wants full credit, it needs to be 154. Floyd is at the level that he's so great, that he needs to put a handicap in the fight in order for him to get a challenge
147lbs I think would be a better option for Floyd. Floyd is the #1 guy in boxing today. He shouldn't leave his comfort zone for a fighter less then he is. Canelo has done squat to make any such demands on where they should fight. Floyd is at his best at 147 as we all can see. The only reason why one would want him to go to 154 is to make the fight less harder for Canelo to compete against him.
154. He's made a point to point out Pacquiaos weight draining ways. He's painted himself in to a corner. Could Canelo even feasibly make 147?
150 or 152. Canelo somehow can still make 154 with no problem. The guy hydrates up to 175 lb + on fight night. The size discrepancy would be apparent the moment they met in the ring at 154. I don't like catchweights in general, but if he wants Floyd I'm sure he'd have to make some form of compromise. That being said, I think Floyd believes he could take him out at his natural weight and I don't ever remember a time Floyd made someone meet him at a catchweight.
If it's for a junior MW title, 154. Not even debatable. Besides, Canelo can't get any lower than he is now.