> - merge 'Autopilot' into the Equipment menu, as a section (probably the first section)

I have no objection with this.

> - potentially rename 'Environment' to 'World'

Environment word looks fine to me.
A quick search on Google reveal that X-Plane use "Environment" but FSX use "World". So other simulators doesn't help here :-D

> reserve the Ctrl (Command on Mac) keybinding space for menu/non-aircraft keyboard shortcuts

I agree with this.