Whatever IFR approach you're doing you are supposed to monitor the aid in use however so, whether that be GPS, VOR, ILS, ADF or whatever. If it's not spelled out as such in AIP any more you still need to do it, it's part of good airmanship. So if ADF monitoring has been removed from AIP is rather inconsequential to the way pilots go about their business. I think we are all in agreement on that...