The thought of transferring at CDG will likely dissuade many; the terminal layout at CDG is really annoying and transferring is more painful than a T5 transit. Throw in the likelihood of a slopey seat and lounges that are not bad, but not amazing (except in F), I would be inclined to go non-stop on BA. But where AF do well is their wider range of destinations, particularly Africa, where they are often the most attractive option (OUA, FIH, LFW etc).