That's quite a bit to take in
Color temperature isn't currently supported
Not sure what's happening with the dashboard - I don't really use it. I assume I need to add a tiles() entry to the metadata?
I'll push an update soon, I've been busy adding some sort of progress display to the app's page, as well as a button to discover only new devices which should help when a device is missed.
When I do the update you'll need to remove the LIFX Master app instance first, update the code then create a new app instance and do the discovery again. I suspect that might be necessary each time the code is seriously updated. Minor changes should be fine, but any time the way that data is stored in atomicState is modified then that's a breaking change for the app.