As long as the zoom didn’t change drastically it would be ok to readjust for each ‘cut’ of the camera.  But if you wanted to have a well integrated zoom you’d have to either build something like you’ve suggested or do a lot of editing in post to splice different animations.  Again, I’m not sure I’ve fully answered the question but I really haven’t taken this to its conclusion yet myself.  Since there wouldn’t be a major call for women with body hair from the masses, I suspect this is a pretty niche solution.  But if I were to ever model myself in 3D I’d need this one!=)  Men always look so fake due to lack of believable body hair.  Plus how cool would this be for furry aliens or animals?  Regardless I think I’ll try to play with this idea more in the future… either as with this hippie crush from my past or in some other incarnation.