As title says the mobs are not dropping non-rog salvageable items like they should. They have an average level of 52 according to sources which I will link below and therefore should qualify to have their loot drops restored.
Berserkers
http://camelot.allakhazam.com/db/search.html?cmob=7662
http://www.mindkayak.com/bestiary/mob.jsp?mob=1863
Thanes
http://camelot.allakhazam.com/db/search.html?cmob=2850
http://www.mindkayak.com/bestiary/mob.jsp?mob=2108
Berserkers
http://camelot.allakhazam.com/db/search.html?cmob=7662
http://www.mindkayak.com/bestiary/mob.jsp?mob=1863
Thanes
http://camelot.allakhazam.com/db/search.html?cmob=2850
http://www.mindkayak.com/bestiary/mob.jsp?mob=2108