The question in this regard is, if the locality of the setup location of the primary "echo" device is in WiFi_1 zone and you take your phone connected to WiFi_2 zone and try to control your "echo", does this lead to complications? There are devices that require the phone to be on the same WiFi net to allow control, not only that but even distinguish between 2.4 vs 5G net frequency. What is the protocol on Alexa devices?

It happens to me all the time.   since I don't play music, it don't matter to me as long as the command happens.    You can give the name of the device you want to use as part of the command.   You can also change the wake name.   

It happens to all of us. Some Echo devices hear better than others. I noticed that the thinner/smaller the device, the more hard of hearing it is. My Echo gen 4 (the large ball) hears much better than any Echo Dot. And all of my Echo Shows are almost deaf. Not much you can do about it. That's just the way it is, probably due to the way the microphones are situated in thinner/smaller devices.

I purchased a pair of Lucyd Fusion frames and compared them to the Echo Frames.    It would be the ideal frames if only alexa was always listening.   I really like them, just a pain to use with alexa.    I can wear them for 8 hours listening to audiobooks at work and power is only down around 50 percent at the end of the shift.    There is a battery in both arms with their own charging ports.   In addition, you can turn off one arm so the charge will last even longer.   

Alexa has to be default on the phone and it needs to be unlocked in order to use.   Since it is only a bluetooth connection,  a button must be pushed to connect for every command.   

If only Alexa was always listening.   I hope amazon will add the additional features to their frames.   I am sticking with the echo frames, except when at work.   

I think it's the skill that goes along with your smart thermostat is the one that's giving you the answer. It's up the the people that made the skill to use the wording that you prefer.

In a way, it kind of makes sense. If you ask what the thermostat is set to, you may want to know if it's in heat mode or AC mode. So it'll respond, the heat is set to X.  But if you already know that your thermostat is set to heat mode and you ask what is heat set to, it'll just tell you the thermostat is set to X.