Andrea isn't nearly as annoying as Lori was... WAS... Hahahahaha!
Anyway... she could be a much better character and I'm thinking they're building towards that with the Governor.
I really want them to do some badass stuff with Michonne, but so far she's just a glorified extra... we'll see. I suspect that they have big plans for her in Rick's group at some point.
Just remember, there is a reason (a few, actually) as to why she is a fan favorite in the comics. As long as they don't make her as bland as Andrea, Michonne may be the most interesting character on the show (besides Rick).