I'm all for more action and less talk. At the same time, if you really have gotten to a new place with new boundaries that you intend to enforce, then that info should be shared with W, she isn't a mind reader.
So, my advice would be to:
(1) First act. Act on your new choices. Settle into them. Become sure of them. Be at peace with them.
(2) Then communicate. Once you know that you aren't going to be swinging wildly, that you are firmly on the path to individuation and getting away from the over-enmeshment/emotional neediness, then communicate with W.
