Very sad news I just read today. My condolences go to family and friends. I didn'd climb with Cyrill, but had some contact here on SP and via Email. He invited me to climb together in the Uri or Glarus Alps, but I didn't find the time. From what I can say, he seemed to be a very enthusiastic person. From what I read here and on other forums some others had minor differences with him because of his enthusiastic and sometimes quite frontal way to point things out, but I guess some of that was just misunderstanding of his friendly open minded and positive thinking character.
I remember the first log that I read from Cyrill many years ago at basislager.ch (now bergtour.ch) where he posted one of his typical summitpictures with spread arms and a wide smile. There was an underline with greetings to his mom. Not typical and that's why I rember it even many years after.
BTW:
Strange to me, that the other climbers that followed on the same day didn't realise an accident must have happened, since from what I understand the team already had left the skis in the depot, when the fall occured.
Someone is in a second team on a normal route following a fresh track coming by a ski depot with 3 pair of skis left, continuing a track that ends in a wrenched off snow slab and no emergency call is made? At least at the summit meeting nobody on the way back those other alpinists should set of an alarm?! Can 10 climbers following them that day be so ignoring?