It's not that far from the last weight division where Casimero became a champ, he can still move the same and his fighting skills especially his speed is still applicable though the opponents strength might be tougher from this new weight but proper adjustments and enough trainings and sparring may let Casimero to stand out and bring the win.
Casimero always put a lot of efforts on the training when it comes there's a new opponent. Wherein he always push his limit. so for me it's not surprising that despite of the record of the opponent he can win and knock it out.. This will be more interesting to watch tbh.
Another interesting stuff I learned is that Akhmadaliev is now promoted by Matchroom Boxing a partner of DAZN. Fulton is promoted by PBC and uses Showtime and Fox as its channels. Inoue is with Top Rank whose fights are televised by ESPN. I begin to wonder if Inoue can really fight Fulton after his Butler fight. Casimero after a fallout with Manny Pacquiao's promotion signed with Probellum a close friend of PBC although I am not sure if the contract remained valid after the cancellation of his previous fights.
If this is the case then I don't think that we see Fulton vs Inoue yet, it will take a lot of time and negotiations for this 2 fighters to face each other. And if Casimero is still with Richard Schaefer, then I think him and Inoue chances to fight is higher since him and Arum have a good relationship as far as I know.
So another complicated things in this division and we might not see a unification after all with this boxing politics. Probably it's better for us boxing fans to see how Casimero will do in his maiden 122 lbs fight.