That's exactly what I'm saying, that these preparations should have been made prior the announcement. His consideration for and acceptance of the role happened prior to the announcement, presumably. This should have been a part of whatever transition plan they had in place.

They knew about his donation two years before he became CEO. It's not like it was discovered 5 minutes after his appointment - they had plenty of warning that this might be a PR shitstorm. There's no excuse for them to be this unprepared.