Deep Deep vs Deep Medium

The last couple weeks I've done preemptive splits on my few remaining hives with two deep boxes. Last year I started moving to a single deep and a medium as my brood chamber. The idea is that the bees will still have plenty of space to lay and store food, but won't spend the entire June nectar flow filling every corner of 20 deep frames. Instead they'll start putting nectar into supers sooner, which means more honey during the flow window. At least that's the idea. And this winter, which was exceptionally long, they survived very well in this configuration. The one concern I have is whether this exacerbates swarming...but in my experience the bees get the urge to swarm in the spring no matter how much room they have in their hive.