I dont know of any articles on cities specifically that arent in compliance as the exceptions have been written into the guideline the AP Stylebook and primary topic exceptions However not everyone favors the guideline and theres always substantial support for eschewing it whenever it comes up For instance in October I closed an RM at Beverly Hills California where there was surprising support removing the state name Additionally the guideline says nothing whatsoever about metro areas and similar subjects that arent cities and towns For example theres no agreement about how to title articles on neighborhoods within cities which comes up regularly In other words there are no conventions relevant to metro areas  and certainly nothing that supports or requires your proposed titles  beyond the standard WPAT policy In fact in most cases I saw they actually broke with WPCOMMONNAME as few if any other sources used them