1. All of Astralis should be disappointed after a loss, and I don't see Zonic as the type of person that would "ragequit" after a loss.
2. I can see that in group stage matches that dont matter but not in playoffs, you dont gamble on your second chance because you know that one bad game can then throw you out of the tournament.
3. For the reasons in the second point, you would not save strats on purpose in playoff matches. It is true that you learn about your opponent in these matches and can adapt if you meet again in the same tournament, but you dont actively hold back.