Hi Helena and Molson. I was at first very much against the EVF on the Sony A7's, and I discussed my issues in detail about the A7r with 50 Cron DR in bright sunlight and not being able to see properly, particularly in sunlight in Australia.
Having both A7r and A7s, they are both setup with the EVF on MANUAL rather AUTO, and set at +2.
As Derek and Tariq have mentioned, I have the Creative Style, Standard with CONTRAST set to -3. I leave the setting effects ON, unless I need to turn it off when I am under exposing.
Also I have custom set my LCD, to have the wheel, bottom (6 o clock) with quick access for setting for monitor brightness on MANUAL or SUNNY WEATHER. For all outside work, I set it to SUNNY WEATHER for when I need to review images and check focus points. All inside work, I set to MANUAL 0 on the LCD, and I rarely change the EVF set on MANUAL +2. If I need to see the exposure effect, I might change the EVF back to AUTO. Usually for exposure, I check the RGB curves.