Provide ability to remotely reset devices.
I just had an issue where two TRVs were 'stuck'. The thermostat had a set-point, heat was called for by the room thermostat, both TRVs should have been open. They were not. I removed the TRVs and then power cycled them and all was well. It would have been handy to be able to reset the TRVs via the app.