Personally, and I might get attacked for this, but I think with her past 2 pregnancies, she has looked much, much better.
It seems as if this pregnancy has taken a lot out of her and she is not really trying to look good. Her hair is always a mess, her skin is dull, her clothes always looks rumpled or messy and if they don't really fit. And it seems as if she is using the colors and the patterns to try and hide these things, which is fine, but she just looks as if she is having a hard time with getting things together. She is missing her sparkle.
The only time I have seen her look really good (during the evening only) was on a recent state trip that she did. Don't remember where, but she wore 2 very nice evening dresses, one was a white slip dress and the other a lace rusty/orange colored dress. It was very early in her pregnancy so maybe she was not as tired. I don't know. But really, this was the only time she has looked all pulled together in my book.