The only legit answer in the blog about the human level error is to: check, and double check your work. If you messed up, start over because it’s a fresh multisig setup, but nothing about future mistakes. 

Additionally the only line for Inheritance is as follows: Inheritance - If you disappear tomorrow, does your spouse know how to co-ordinate a 2-of-3 spend?

Thats a one liner for your future generational bitcoin stack. Seems inadequate to me but fair enough that it is our responsibility to show them and educate them.