@deanveatch and @Luft, there are other integrations such as Hue and Lifx which I am sure someone out there has lots of devices and I have not heard of issues with those. There might some efficiencies to be gained in this driver code. Check the logs > Device Stats and see what it is showing in there. I only have one device but the ms, Avg is high on the integration driver compared to other "devices".
I also have started to mess with local control on my device, so far I am able to sync on/off state but it is using Node-Red. If it gains interest I was thinking about checking into the generic local control driver that someone else posted (it needs to be tweaked for each type of device).
