She's lost her looks but has become better actress
She might be looking far older than her age, and she's sickeningly too thin, with too wispy hair that she's unsuccessfully trying to form bangs out of... and she's lost her looks and is hideous, however, she really surprised me with her acting in Walking Dead. Other than her too oft used gimmick of looking down (she did that a lot in PB, and here she did it in the last episode when Shane was around) Sarah portrayed Lori very differently from Trancedi. Lori spoke differently and had different mannerisms. Sarah acted her butt off in Walking Dead! Loved it.
So she's lost her looks, but her talent has blossomed! That's a good thing for her.