I disagree with your weight analysis. But more simply...
Why would Floyd fight Canelo again? I don't understand what the point would be given risk/reward. He beat him so easily---it's not like it was competitive. Canelo is a lesser boxer, that was established and is not disputable.
Plus, Floyd is old and retired. If he makes another money grab or two, doubt it is against Alvarez. Maybe I'm wrong.
And what is the Jon Jones reference? Canelo got busted for juicing, not Floyd.
First let's the get context correct. Canelo Alvarez has been bombarded with industry reporters asking loads of questions including his thoughts on Mayweather vs Khabib. Canelo, as a CURRENT P4P boxer, stated that fighting Khabib wasn't an ideal look for boxing. We then have the entire LDBC on Youtube, whom are the biggest following of new media in boxing - superseding forum gossip (in which they actually interview boxers), went on agenda to discredit Canelo Alvarez relating to the whole DAZN deal. The moment industry reports headlined that Canelo Alvarez is the richest boxer to date by contract, Mayweather Jr. went on to claim how easy his victory was against him with or without the PED steak. Within this whole drama, Canelo has invited Floyd, if he wants to, to do the rematch..if he wants to! Canelo has also continued making headlines that it's Floyd's problem, not his, regarding all the hype as of late.
To further, there are more reports that Mayweather vs Khabib is just a publicity stunt. Realistically, how could Floyd sell a Khabib PPV better than the McGregor bout? A cross combat PPV vs a legitimate boxing match between P4P is what Oscar De La Hoya was insinuating. Here forward, no matter what Floyd does, is no longer P4P, whether it's beating Pac. He would have to fight Crawford or Spence Jr. There's even rumours that when Canelo, shall he beat Fielding, will be ranked to P4P #1.
Knowing Floyd, if he implodes, he will seek the rematch with Alvarez as industry affiliates will try their best to headline Canelo's success over Mayweather Jr.
Personally, I think Floyd should leave it alone. I have a weird feeling that Floyd could possibly tarnish his legacy if he makes the wrong move. For me, the best thing Floyd can do is SHOCK the WORLD and fight Khabib in the Octagon and give Khabib 50 million GUARANTEED to only stand and strike, no take downs. If Khabib were to take the bet, I doubt the MMA world would complain, it's Khabib's challenge. That PPV would do 6 million+ EPIC