In those circumstances I tend to opt for inverted pyramid writing, in the hopes that the skimmers will get the gist and folks who really care for the details will get what they need.
But it's a tough balance, which is why it's critical to a) know your audience and b) have a clear understanding of what you're expecting when you're communicating. Are you sharing information? Communicating a decision? Seeking feedback or approval? All of those may require flexing into a different style to be most effective, particularly when taking audience into account.