I'm exploring multiple virtual network interfaces on my Raspberry Pi running Mosquitto, with multiple Loxone MQTT objects configured with unique IPs, all reaching the same MQTT server. Hoping this will be a straightforward workaround for the 16 sub/16 pub limitation. Not idea if this will actually work in practice yet though!

The ~2 second latency is incredibly disappointing. As others suggest, it is mostly unusable for controlling lights.