Big fields would look comparable to Redacted if that was done. It's less intense so I don't think XM and portal visibility would take a hit.
No, I want to see the streets
It wouldn't be any worse than currently and fields would look alive rather than one flat colour.
Fields did look alive. There were swooshes highlighting fields. But they were removed or drastically decimized because people complained...
There is only one answer for this: make things configurable and everyone will be satisfied
Each ability for users to configure stuff increases effort to implement and test changes in the future. You will usually try to remove options in software because of that.
I do not think it would look like you think it would look.
Texture would solve that issue.
Texture like there was in Redacted
It would be painful to see anything