It seems the crevasses have been worse than avalanches this year in Chamonix. On March 15 and March 19 two more people were killed on the Valley Blanche by breaking through snow-bridges and falling to their deaths.
March 15 an elderly French man travelling in a large group of other retirees (unguided) broke through a snow bridge on the Col de Rognon and died from the fall. On March 19 a second snowboarder, also with a guide, died falling into a crevasse just below the Requin refuge.
Nothing more to add, and few details have come out surrounding these last two deaths.
In an avalanche March 15, a locally well-known architect, CAF member and mountaineer, Pierre Trappier (70), and his wife Marie-Jo (64) who was very well known in the environmentalist and anti-Tunnel du Mont Blanc group the ARSMB (Association pour le Respect du Site du Mont Blanc), died not far from their home in Les Houches. The group of 5 ski tourers had removed their skis to climb a 40 degree couloir on the way to their annual ritual of skiing the couloir Trappier (beware of the music on this link to the video of the Trappier Couloir on YouTube) on the north side of the Aiguille du Goûter (yes, he discovered the access route to this now well-known couloir).