Please provide players the option to decide if they want to be automatically added to area voice chat.
It gets tiring to be automatically added into area group chat and hearing the loud pets, screaming children, children swearing, etc and having to manually leave the channel all of the time.
Allow players to set a global setting to auto-join or not and let them manually join if they so desire. In most cases, open world requires very little need(note the word there, need) to use voice chat as a default.
In many cases I am in a Party group and using that for voice when I want it, the quality seems to be better than the in-game also. Maybe even go so far as to configure ESO to be 'smart' enough to detect when you are in the XBOX Party app that and will set in-game voice to auto leave....