I think I’ve emphasized defined membership way too much. I think circles with defined membership as a pattern are currently not the most needful thing to introduce.
I have no idea how the relationship between decisions in the meeting and the forum should work, but maybe the best thing is to experiment. Maybe consent-of-present is part of the solution. But how do we decide which decisions to bring up on the forum?
If all decisions are made on the forum, people won’t use the meeting for making decisions. But then, maybe that’s a good thing – other things can be done in the meeting, or maybe the meeting is simply not as convenient as using the forum 
The more important discussion now would probably be: How can we do consent decisions on the forum? See Process for consent decisions on the forum. In particular, I completely removed my emphasis on defined membership and instead proposed all forum users to have consent rights. However, I feel if control is truly in everyone’s hands, things could get out of control at some point (e.g. someone blocking everything with bogus objections). Hence, I propose that only certain people are allowed to participate in qualifying objections.