You can also have interesting conversations about power differences between characters since power is also deeply tied to a fighting shonen where all the conflicts are resolved through fisticuff. It's senseless to think that powerscaling wouldn't be a major, if not outright primary, reason people read a story that targeted to teen boys that the main character always solves the major conflicts with his fists.
I'd say that powerscaling should take precedent over mystery bait as it's more than just theorizing shit that may or may not happen based on the writer's whims. At least with powerscaling you can point out potential writing flaws on the discrepancies between character's showings if they're inconsistent.