Have you tried? It would not hurt to just do something like this.
I have never recaptured subclips but I would think you would need to make the independent to break the relationship of the footage on either side. But once this is done why not recapture and then rename the clips, seems like that would be the same amount of work but in a different order.
But if you have already renamed the clips just give it a shot. When you make the footage offline just more the clips to another folder for safe keeping, if it doesn’t work you can bring them back and relink.
But then the question that comes to my mind is why are you even going to the trouble, if you make independent the clips will act just like if they where captured as smaller clips.