I've never seen Melissa Benoist in anything but I'd prefer if they went for someone who has a background in comedy too.
Megan Fox's April was just really boring and was only there to be perved on by the male characters, which feels really dated and unpleasant to watch. I don't even think Megan Fox is a bad actress, she's very good in Friends With Kids and This Is 40, she was just saddled with a bad script and looks bored throughout- especially in Out Of The Shadows.
I don't really know who to suggest as an alternative but given all the positive responses to the Benoist suggestion, I'm guessing she would be a good fit!
