A queen won't lay more eggs than the cluster can cover, if you want to try and save this hive then add a frame of nurse bees and brood ( if you think the donor hive can spare it?)and see how the queen responds? Carnionlan queens go into winter with a small cluster and once they start building up they can build up in a hurry and are prone to swarm. With the up and down crazy weather we've been having here in SW. Mo.my hives have some how built up strong, this coming week is going to be in the mid. to upper 80's so i'll have to look for swarm cells.