McKinnon and Fitz for B. Cooks... thoughts?

McKinnon is my rock solid flex position and I don’t really know what Fitz will do rest of season. Thoughts on this trade offer? I go back and forth…

My other starters are:
RB: Gurley
RB: Freeman
WO: M. Evans
WO: K. Allen

If these are bench/Flex guys I would do it. Who’s your other depth?