As an outsider looking in, seeing the rosters my friends do in various ME companies compared to my roster and there is no doubt in mind that cronique fatigue is highly likely by them and that they are not sustainable long term wise, further with this fatigue the risk of accidents is greatly increased.
The subject has be be approached professionally but there is an ideal moment to draw attention to and tackle this subject. As ExDubai states, the opportunity will not be there in 5-6 weeks time, indeed perhaps not in ten days if not voiced now.