I for one would like to see more of it, I feel like not many people are doing POV from the female perspective with the respective grunts to along with it (proper grunting is probably worth it's own discussion). I think it even allows the person punching at the camera to do a little wilder with their offense since they don't have to worry about hitting a target, so if anyone has a speedy 30 hit combo stored away it'd be a good time to whip it out.

Also you can easily create a sort of image in your head of who's POV is getting worked over by having them first appear in front of the camera, and never really have to show them again since their part can be filmed at any time (maybe get some pre-recorded grunts from them in ADR or a post dub. Sort of like building up fantasy matches while only needing one person to do the actual boxing and then anyone can film it.