Specific environment areas
The ability to have environment areas so you can select where an environment starts and ends. For example, instead of fog everywhere, you could allow outside fog only and not inside.
Environment needs the option to alter gradient colors, adjust colors altogether, adjust intensity, and alter extent and reach of environment.
Example: I had to use an invisible box to create shadow to make an area darker under trees. I could have used a smaller environmental box to achieve a similar or better effect.
And the pre-sets are too limited and overused. Manual variability solves this.
VJ Franz K commented
And more total control of sky and sunlight colors please! Including making it script controllable