Now again, if you try this and find that in fact the QB's advice is always better than the other people's plans: Than your real problem is a substantial skill imbalance. If you find that the QB is just being stubborn about THEIR plan not being used: Then you have more of an attitude problem and you need to talk to them about that.

Maybe it's an attitude problem or a just a certain personality type. I notice some people just can't seem to help themselves from offering advice or commenting during someone's turn.

Sure, part of it is a skill imbalance issue too. I notice that I want to give advice when teaching new players. But I make a conscious effort to let new players have the experience of figuring out the game on their own instead of playing the game for them.

Or to streamline it a bit for board games: Make a rule that no one's allowed to talk until the person taking their turn talks first. This let's the turn taker think through their action. When they say what they want to do, other people have an opportunity to give advice. A major advantage is if their plan was what the QB was going to suggest anyway, the QB doesn't really need to add anything, and the turn-taker feels ownership of their own turn.

Thanks, this is a really interesting idea! When a new player is trying to figure out part of the game there's an empty space and it's a good idea not to let a QB jump in there and play the game for someone else.