I used MAQS on 26 double brood colonies. A very easy to apply treatment. There was no bearding and no obvious corpses thrown out. After a week I removed the strips and checked all the colonies over. All queens were present and correct and all laying. All but one had eggs but no young larvae indicating queens had gone off lay for a few days. The single exception had both eggs and young larvae. Not sure what all the fuss is about.
Out of curiosity, what were the double broods like? Mine had rearranged so the nest was in the bottom box and the top box is wall to wall honey with beautiful white cappings, quite convenient.