The NG's are used for domestic as well as regional sub saharian routes. Everything seems to be running smoothly on those operations.
The only concern is that the 767 is the only plane going back and forth to LFPG and whenever it encounters problems (like the recent worn wheel thing) you can expect some delays. But theyusually try their best though to book you on Air France, otherwise you'll get a 4 star hotel stay and food, the least they could do I guess.