Not suprised - he looked very frail in October when he met the Dalai Lama. (The only thing I'm suprised is that he's the first person to die from that list)
As far as I know his predecessor Khensur Lungri Namgyel (ལུང་རིག་རྣམ་རྒྱལ) is still alive and 95. He lives in the Thar Deu Ling temple in France, Île-de-France, Seine-et-Marne, Chelles that he founded in 1980.