You first allowed the locals handle the situation, which is almost always the right thing to do.
When they proved to be idiots in search of a village to shoot up, you made the right decisions.
Your choice of who would be in charge locally was inspired.
You dealt with a potentially deadly and explosive situation very smartly.

Some might criticize you for not moving fast enough, but seriously, what rational person would expect the police to start riots, shooting tear gas at media groups, arresting journalists or having a quasi military response that only made things worse?

Congrats, Mr. Nixon. You done did good. I suspect the people of Ferguson will thank you for it. As will all other rational thinkers.