I think he had adapted already to 175 lbs, but as we have seen his performance though is in question. But as per that link posted, when they interview his father he had injured his hands in that fight.
And as far as adaption goes, he survived and win that fight, and one thing that goes with him is that he is still very young and so his ceiling is limitless for now. And as Light Heavy is also filled with monsters like him and powerful boxers, it's really gets exciting to see them, like they have their own version of the Fab 4, like in the 135 lbs before. So very bright future for him and hopefully that broken or brittle hands will not be a problem for him in the future.
Just need to take time healing his hands while waiting for his term, like what mentioned there are many big names in this division and giving an opportunity to fight against one will surely a big break for him, he needed to make sure that very preparation will be taken seriously as the fight might become a big break for him to reached the top, though most of the time it will be a rough road to take and not all can break that wall and start to shine.
Speaking of hand injuries, it is also reported that Shakur Stevenson did break his knuckle and did go under the knife for a quick surgery and his fight with Cordina is not cancelled. So it's obvious that the hands are the first one to get injured for this top level boxers and hopefully they can recover very fast.
It's more on determination and I like that observation, he's still young and very capable to improve his skills since he's already on the level where champs will meet on the top.
That's one advantage of being young, their body tends to heal very quick. And since Benavidez doesn't have a schedule fight, then it's good for him to rest till next year. But for sure he will be tuning in on the Beterbiev vs Bivol fight as he says that he will challenge the winner.
It happens sometimes..