I have a different interpretation of L3. I agree it is Kathleen Kennedy embodied, but I thought they took it to such extremes as to utterly take the **** out of that class of person.
In the end, she gets her head ripped off, and becomes subservient to a machine, in which she now lives for eternity. Her personality and hopes and dreams destroyed and gone.
Or maybe i am reading too much into such things.
I also thought this. I also wondered if this is the reason the original directors got fired, when Kennedy finally figured it out but couldn't remove L3 because, by that point, it was integral to the film.