I've watched a lot of fights of Casimero live and on TV and noticed the changes of the fighting style of this guy. I'm just glad though that he is on the camp of Manny, he can earn more there as MP promotion can get him big fights in terms of money.
Because MP promotion is a world class promotion, Manny can pay good trainers to trained their boxers pretty well and that improvement or changes you saw in casimero might is maybe because of that. Manny being the promoter who is still active in boxing, he can give tips to a boxer on how to be successful in the right and with dedication, nothing is impossible.
Being a hard puncher is what casimero's gift but he has to improve his speed more so he will not rely on one time shot knock out all the time when fighting a taller opponent.