Interesting. Looks like a lot of work.
Beekeep missed the opportunity to add checkerboarded super boxes to the hive. At the right time, that alone will prevent swarming. Also could have made splits, which I gather is what is being done now.
I would put swarm traps/nucs all over the property. Smear the top bars with honey, inside the box and at the entrance with lemongrass oil.
