Replacing her with Ivanka shows what it really takes to get ahead in the Trump organization.
Why should Trump be any different from his Dad?
Had his dad not bailed him out during his crash (a fact he conviently leaves out whenever he tells the story of his fall and re-emergence) by walking into one of Trump's casinos buying several million dollars in chips and just walking out of the Casino with them (IE A below the board cash infusion that Trump Senior did end up paying a fine for) Trump would just have been another flash in the pan flame out.
Not to mention he always leaves out Daddy's original backing that got him started as well.
I definately personally think Caroline had been putting her celebrity above her daily job, at least it appeared to me to be... So I'm not overly suprised that she was let go.
She'll be fine, hardly is she going to be hurting due to this action.