I think it's important to understand that there are lots of different ways to do poly.
Sounds like you are doing a more family kind of poly, versus a solo poly. Both are great, but they work very differently with different expectations of parties involved. Which-as a result of the board being a mix-means you will get perspectives that won't pertain as much to your situation (but are still REALLY good to consider).
I always write my thoughts first.
But-as a receiver, I think I would prefer that I get a "honey-I wrote some of my concerns and fears out-I'm not sure this is a good time, and I'm not sure I wrote them well-but maybe you could look them over before next weekend so we can go over your thoughts, my thoughts and maybe come up with something a little more sensible for us?"
Before being handed a list of "rules".
My abnormal psych professor was just expressing last Wednesday how hlepful it is to lead into a difficult topic with "Hey-this is a difficult topic and I may hurt your feelings with my inability to express myself well, but it's not intentional and I hope you will be understanding of my failures and see my efforts."
This gives the other person warning to pause their own reactions, knowing you may come off as an ass, but aren't intending to.
It seems silly-like we should KNOW that already right? But somehow saying it makes it easier for the other person to REMEMBER it "in the heat of the moment".
As for the specifics you listed. I see no big deal with them.