...My elevation is on "0" - Should this be changed?
If your elevation is listed as "0", that means you're set up for sending station pressure (absolute) rather than adjusted pressure (altimeter) to myAcurite and wunderground.
If you go into your device setup in myAcurite and switch to adjusted pressure, it will reprogram your Access (or SmartHUB) to reflect your elevation (based on your address) and change your pressure to an altimeter reading.
I admit that I am a novice at this and using this forum to learn before I buy (still waiting for the release and reviews of Atlas Elite before I decide what to buy). That said, it is disappointing that AcuRite does not allow you to configure elevation. When I look up the elevation of my home using the address, it is 833'. I am reasonably sure that is about 10' low even at the street. Then on top of that, my lot has a pretty steep grade up to my house, and I would mount the device on my upper level on a desk, so that would mean the elevation of the barometer sensor would be 15' to 20' higher than what the address would show. I know that is probably only a hundredth or two on the adjusted pressure, but it seems to me like Acurite could make a simple software enhancement to allow you to configure the exact elevation like other brands do.
At this point, I guess my plan would be to find and use an address that would be a closer match to the true elevation of the installed barometer, but I wonder if using an incorrect address would have some other undesirable effect.
Like I said, I am a novice and still learning, so I would be happy to be enlightened by more experienced folks about why it is unnecessary or a bad idea to have a specific configuration option for elevation.