Has anyone approached Cosmique Hut by this way, instead of the usual method of taking the cable car to Aiguille de Midi? It seems to me this a 'cheat', taking all the expedition/approach aspect away from a climb of Mont Blanc. (Similarly, taking a ride to Nid D'aigle on the Gouter route!)
So, my idea is to spend 2 days walking from starting point Chamonix itself, up the Mer de Glace, stay at Requin Hut. Day 2, walk/climb up Vallee Blanche to Cosmique, spend night 2 there. It seems to me this would help take care of acclimatization too, being a very slow schedule (only 6km per day), reaching almost 4,000m over 2 days.
My biggest concern, though, is the terrain, having heard much about the crevasses there, and nowhere can I find reference to anybody having done this (there must be a good reason!). But it is a hugely popular ski route, so how dangerous can this vallee be? A walker can surely avoid crevasses easier than a skier? So, main question is, has anybody walked up the Vallee Blanche to Cosmique, or heard of anyone doing this? Secondly, is it possible in May?