I'm thinking Laura purposely chose her understated outfit so as not to compete with whatever Michelle was going to wear. It would be like her; she's such a gracious lady.
But I too, can't stand the open coats in a cool weather outfit If you need a coat, then there needs to be some way to close it without continually holding the front pieces together!
No riding hat for Inauguration, obviously, but could also be paired with a pillbox or cloche and do just as well. Something like that would have been so over the top — especially if she had chosen a brilliant color.
Mrs. Bush started choosing matronly outfits that made here beautiful figure disappear. That's no way to highlight what beauty God gave her as a gift. She was the complete package — class, beauty AND disciplined.