Kathryn Erbe was axed from Criminal Intent
due to budget cuts. If she was too expensive for the much more cheaply produced Criminal Intent
, I highly doubt that she would have been hired onto Vanilla.
I'm pretty sure that the new "commanding officer of the detectives" character would have been filled by some mildly known B-list actor, as have nearly all the vacancies in Law & Order
's history (with the notable exceptions of Dennis Farina and Jeff Goldblum).