Your post seems to indicate that Walt Disney World doesn't care about the events that transpired yesterday. I think in many cases the Cast Members who showed up to work, as they do on any day and during times of emergencies and crises and on National or Major Holidays away from their families, speaks volumes. As someone said earlier: the show must go on and outside of two hurricanes as well as 9/11 - WDW has not "closed."
To put things in perspective, if you were speaking face to face with some front line Cast Member in front of or inside of the Festival of the Lion King, they have no more power than the Cast Member scooping popcorn at the Castle hub if you ask them to delay Wishes since your significant other is at the bathroom. The gesture would be nice, but there are so many other factors that are at play. Also, put yourself in their shoes and realize they've probably been at work for 8 to 10 hours with little bits of information being gathered on their breaks, if they can stomach it. If you showed up saying Lord Voldermort requested a moment of silence at 6:00pm they have justifiably no way to verify it.
Yesterday was a tragedy, but also keep in mind that Walt Disney World is always protective of keeping the events that are occurring outside of its property out of the Guest's mind. It's why flowers and trinkets for the events that took place in Paris were moved essentially off stage.
In addition, the teams that handle most of the U.S. flags on property are Walt Disney World security. I can't speak for why it took long to lower it, but as you would imagine (and if you've seen the reports from Magic Kingdom's bag check yesterday) their focus was, as always, safety. I'm sure it was a busy day.
So I know your and others in this thread have a perception that Walt Disney World is not proactively addressing the events that took place locally and to the community. I ask that everyone please take a step back for a moment. Consider everything. Understand that the size and scope of a business as large as Walt Disney World cannot turn on a dime. Be respectful and mindful that there will be Cast Members who will not be returning to work and lost their lives.