Sorry, I didn't understand why you said residential is more appropriate than unclassified. For instance, the roads you mentioned that "following roads are to connect residential streets and provide access to housing:"

www.openstreetmap.org/way/511483505, www.openstreetmap.org/way/1172898912


If I'm not mistaken, the Indonesian tagging guidelines state that highway=residential means "without the primary function of connecting settlements." 

Actually, In this area i'm already changed it to unclassified https://www.openstreetmap.org/changeset/136435901, but some one changed it back to secondary https://www.openstreetmap.org/changeset/136440394
 