You should be able to compensate for that with a larger front lens on the camera that collects more light, but 48fps should not be a particularly difficult issue with modern tech, considering video cameras can shoot at 60fps no problem.
Also, the HD video era with regards to set dressings, makeup and such is something that has concerned people ever since the HD video era started. I noted as late as today actually how fake the fake fiberglass snow sets in the Hoth base hangar of Empire Strikes Back looks. They're alright as long as you actually don't LOOK at them, but if you focus on them rather than the actors you notice joints between individual pieces and the limitations of where these imitations of sets just can't match reality. Like how it interacts with light (snow is somewhat translucent for example and fibreglass generally is not, and so on.)
Also, the HD video era with regards to set dressings, makeup and such is something that has concerned people ever since the HD video era started. I noted as late as today actually how fake the fake fiberglass snow sets in the Hoth base hangar of Empire Strikes Back looks. They're alright as long as you actually don't LOOK at them, but if you focus on them rather than the actors you notice joints between individual pieces and the limitations of where these imitations of sets just can't match reality. Like how it interacts with light (snow is somewhat translucent for example and fibreglass generally is not, and so on.)