mikey, are the queens from the splits requeened or 'make your own'? swarm queens this time of year, for me.........a crapshoot.
it's all about genetics, nutrition and how well fed they are, and abundance of pollen and nectar. apis can probably shed more light on your question than i can. had swarms in august with well producing queens and some not. i don't like to pick up swarms this time of year in my climate, again, it's a crap shoot.
i see how well the queen is doing, if i think the hive won't make it, i combine with a stronger hive. also, this time of year for me in my climate, i don't usually do any splits and any hive i find queenless is probably combined and if a queen is failing, the bees are combined as well. otherwise will not make it up here. sorry this probably doesn't help you, just the way i do it here in wisconsin.