Dr. Z,
I have always found laying worker hives to be a huge problem to fix. Meaning many ways usually don't work better than 50% and to requeen, seems to be a waste of a good queen because she usually gets balled.
What I do know is, make a paper addition to another queen right colony of nuc, let them be for a week or 2 or after they settle and then split the colony or divide back introducing a new queen to the split.
This works almost 100% for me.
Good luck.
Mark