i wonder how it would work to take a couple of frames of eggs and brood with nurse bees, and put them in a nuc for a few days. just long enough for them to start queen cells. then you could transfer those to the hive and hope for the best?
I would think that that would work fine.
It sounds like another method of dealing with laying workers...make a small split and they can raise one or add a queen and then combine that to the LWC with screenboard. The screenboard allows the queen to lay in the small happy queenright hive and the combine to take longer allowing the better queen acceptance.