Well, in the end I decided not to use a queen excluder. They're pretty solidly filling the frames in the top box with nectar, so I figure she won't pass that to get to the supers. I'm not taking that top box anyway, so as long as she doesn't go any higher I think I'm okay.
Well not meaning to hi-jack this thread but...it goes like this.
Option one- If she needs the space and there is space in the next box she will go there. Good thing as I see it, because I don't worry about brood in my honey supers etc. I run free roaming queens. I just let the brood hatch or do not extract frames with brood. I leave them. I realize some folks freak out about the cocoon in honey issue, it will separate itself if left standing. I know I am about to come under fire but the things you find in a beehive, and also we all know the ph of the honey factor. Have you ever seen the left over of a chain uncapper???
Second option she has plenty space below ...so you are ok.
Third option and most likely if you really don't stay on top of it- She needs the space. She does not cross to the top or the top is crammed with honey. The bees see the ceiling, they begin to run out of room, backfill the brood chamber, and too the trees they go

My point is watch the brood nest and keep it open and expanding.