What if my siblings and I designed the future of this family ourselves instead of waiting for Dad?

Do it. The siblings who do this almost always end up with a better plan than the one the founder would have built alone. Kris Kluver, in The Dysfunctional Family Office, has the Mitchell siblings ask this question at the fire pit one night and then act on it. They sketch the org chart on a cocktail napkin. They argue through the points where they disagree. They produce a plan in one evening that their father had been trying to build alone for ten years. When Robert eventually walks out and joins them, he looks at what they've put together and admits as much. The pattern matters. Founders building succession alone usually make worse decisions than the next generation makes together. The kids see each other's strengths more clearly than the founder does. They negotiate roles in real time. They produce a plan they're each invested in. The fix is to start. Don't wait for the founder to design this for you.