What I have heard throughout the years is that Vincent D’Onofrio is a pain in the ass to work with.
Julianne Nicholson left because of her 2nd child. Rumours were that the remaining three defectives would all mix and match together instead of hiring a replacement. This news came out of no where.
But like i said they should just end it and send whatever characters want a minor role to the real L&Os.
The way things are going all
the current L&Os will be off the air within 2-3 years tops. L&O is on it's last leg, SVU the main characters are thinking about leaving the show, and CI is now completely a different show. What will the world look like without a L&O on the air?!