I like have ways to do stuff spelled out (I made up my own 'GM turn' for Blades that is less detailed than this), so I like the idea and would have fun with this. I can see it turning some people off though, so emphasizing that it's optional and making sure it doesn't get in the way of running a session sounds good.
I like the idea that this turn can be done in front of the players (I like mystery and hidden info, but if it's explicitly part of the session similar to Downtime, that might make it feel less out of place or like homework for some GMs?)