Not at all, Amelia. I like them, and I like the stockings as well.
I've noticed a few times over the years that frequently, following CP Mary's wearing something different or a little out of the ordinary, that by the next season, it's commonplace. I don't like her every choice, but I do admire her style - she's something of a trendsetter in my opinion, or at least aware or every new fashion nuance.
As for her hair - perhaps she's attempting another style? I know that it can be a little awkward when trying to grow out a fringe or shorter front pieces.
If she looks drawn and tired (though she doesn't to me) maybe is just tired. It happens.