My massive crush on JLC aside, I fell for Clara immediately in Asylum of the Daleks, but liked her Victorian version better. I still like the Victorian version better, but Clara v3.0 has definite potential. Yes, right now she's a plot device; I think we're not being allowed to see it yet because the writers need her to be a plot device for now. That's part of what was so frustrating about the reset for me. They went to an interesting area with her and the Doctor only to rip it away. We'll see if it's picked up again in the finale.
I like her spunk. I like that she doesn't listen and I like her suspicion of the Doctor. And I like his fatherly affection toward her. She's headstrong like Amy yet....different. There's a very natural give-and-take developing with them and I hope that there's enough time to fully develop it. And it will develop once the constraints of this "mystery" storyline are shaken off.