That's my understanding that you all have to be on the same plan.
It's an unfortunate position, as by the sounds of it, the plan would work for everyone, bar one. I have to say, the way we did the Deluxe Plan was to have a signature meal a day and one other meal and that wasn't too much food for us. Don't forget, at the signature restaurants, they do work out portion sizes to ensure that you're generally not stuffed by the end of the meal. I don't know if that helps at all?