The X1D focusses wide open. As I said in message #220 above: in the Sony mirrorless cameras, focus is done with the aperture closed down, so there is never any focus shift. This would be a possible solution for a firmware upgrade.
As long as it's an option and not the default behavior it will be fine.
Focus shift is not an issue for autofocus (the autofocus system can compensate) and most people don't use the manual focus that often.
Closing down before autofocus will impair the autofocus system that it not exactly the faster of them all.
Cutting the light available to the autofocus system, many times (F8 will be more than six times for the 90mm) to accommodate people that manual focus a lot, and testers, don't seem to be the more productive path.
The autofocus system, on the other hand, could handle it.
But, as I say before, an option it will be great Idea.