My two cents worth.
She does look gargantuan in these photos. The heels were a definite mistake. However, in terms of her outfits, she is making vast improvements. The yellow, and the cheery blossom, very nice.
Clearly she is gauche and awkward, but she is giving it a decent try. At least she is not smacking gum, or taking selfies at a funeral with hot blonds, like her idiot childlike husband would do.
When it comes to the Obamas, it is too much to expect them to do anything correctly, without flaw. You have to judge the Obamas by the marker that it was not a complete disaster, or a complete fail. That is what success is, when your name is Obama.