For those of us who are spending all of our cognitive horsepower just to keep rowing the boat forward and meeting expectations and don't have spare hours to just wander and contemplate lief and work and motivation and improvements to process or the team, this seems like a recipe for receiving random bullshit answers.
UNLESS - the manager were to schedule time for that pre-work, like setting 30 min on the cal for separately brainstorming answers and then 30 min immediately after discussing anything that came up. Which I _do_ think would be awesome.
But just saying "hey here's a google doc, any time you have a thought pop up during the next couple weeks jot it down" won't even work. You need to schedule and prioritize it agains the other tasks you are asking the report to work on.