Another approach especially this late in the year you might consider is give them space but not by moving to a ten frame box. I would set another nuc box on top of it and let them work vertically as they will actually do much better that way, then once all that is drawn out, move them to a ten frame box only if they get enough done before winter. the evenings will start to get cooler soon so nuc boxes going vertical makes it easier for the bees to keep the brood warm. If you can pull frames of brood out of strong hives now, highly recommend it.