One of the things I think about when considering how the FixedFocus would work - I think about what can't I do with the camera as a result. I'm sure Joe and Elle are considering these "on the set" variables as well and I hope they include those notes of how the feel about them when they present what ever the final design turns out to be.

Specifically I think about rack focus shots. I can live knowing I'd need a lens that can adjust focus to achieve that type of shot. More important to my own personal style of story telling I think more about moving the camera. Which of these lenses will have infinity - so that there is freedom of movement. If I know how far the cam needs to be away from the subjects I can always maintain the buffer and still know that the further the subject goes away - they will still be in focus.

Will the lens mark the front and back ends of the sweet spot? For example will the lens list 2ft-12ft and that is the "in focus" area?

When I think about pushing in to add to the story - I'm eager to know if that is a shot that can be achieved and at what parameter or not. Since there is no need for a focus puller for that type of shot since there is no focus to pull - will the sweet spot be physically large enough to push in or pull out and still have the subject in focus. How far can the push be and will that movement be enough to communicate the real movement or not. Those would be things I'd like to know are being considered.

Will these be great for fight scene to get in close? [I would think yes]
Will these be great for a super wide establishing landscape shot?

Lastly what would be the formula for ND filters and getting the iris right in post.
Lens is f4, shot is 5.6, one stop filter and you're ok.
Lens is f4 shot is f8, one stop filter and one stop adjustment in post and you're ok?