My take on it is "who am I to decide where the queen needs to be in the hive? If she needs to lay eggs in what I have deemed a honey super, then she must need to be there - for space, for spacing, for community, for inspiration - it doesn't matter why she is there, but she obviously needs to be there.
If I were a commercial beek, I might think differently, but as a hobbyist, I can pick and choose the frames I harvest and if the queen has chosen a frame I designated as a honey frame to use as a brood frame, more power to her. I just leave it in the hive and don't harvest it (haven't developed kathyp's cannibalistic tastes yet :evil:)
It must be what the queen in her natural instinct sees fit to do and I celebrate!
Linda T