I don't understand what you mean. If you have a 2-of-3 multisig vault and you lose 2 of the 3 keys then obviously your money is gone.
I am not saying this sevice is good or bad, although I posted that there is something I dislike that they do.
From 2 of 3 wallet if I lose 2 keys and from 3 of 5 if I lose 4 keys or even 3 keys then casa can not help me at all. Can they ?