Yes. This is option. But still prothesis. I can connect external i2c eeprom to save states and restore them after restart. But this is not solution. If esp go down for more time - outputs can not match witch domoticz. About RF flood. In domoticz schould be a tick for any devive "resend state every X ...

From topic http://www.domoticz.com/forum/viewtopic.php?f=6&t=19134 . Basic option for fault tolerant solution with dumb devices connected to domoticz, but i cannot imagine why is not implemented...