I've just switched all my thermostats from Ecobee to Nest. I believe the Ecobee is a more advanced and flexible thermostat, but the Ecobee plugin for Vera was unreliable so that, coupled with personal preferences on design, prompted me to make the switch. I've been a bit disappointed in some lack of flexibility with the Nest, but the most annoying issue is not having the equivalent of a vacation hold (or an "extended" away).
I have two homes, and when I leave one, I [used to] switch it to some cool/setpoints that were broader than the eco setpoints you would normally set when you just leave your home to go to work, or run an errand, etc. This was done easily on the Ecobee with only a couple of commands using the Advanced Editor. The Nest offers the Eco setpoints, but those are for short-term vacancies from your home. The Nest also offers "emergency" setpoints that override the thermostat when it's turned off, to prevent pipes freezing, etc. However, those are hard-limited on each end to much colder/hotter temperatures than I would want for a vacation hold. So, bottom line, there isn't a simple setting to put the Nest into a long-term Away, or vacation, mode. My only options are to let the Eco temps take over, or to shut off the thermostat completely. The former would result in over-heating/cooling the house in my absence (wasting energy), and the latter would be letting the house to get too hot in the summer - my vacation home is in the desert so I keep the A/C set to 88 when it's not occupied.
That was a long explanation for my question...can I use the Advanced Editor in the Scene Editor to change the Nest Eco heat/cool setpoints? This would allow me to set the temperatures I want for extended absence, and then put the thermostat into Eco mode, which is equivalent to a "hold" that shuts down the auto home/away functionality. I could then reset to more normal Eco setpoints when I return to the house, and then let the auto home/away functionality resume.
I see a lot of commands for the Nest device in the pull-down list in the Advanced Editor, but I don't have a clue what most of them do. Is there a comprehensive list of the commands and their arguments floating around somewhere?