A missed opportunity from fourthirds days has been to install a focal range lock on olympus system cameras.
Olympus had a pretty poor in prism pdaf and it sounds like the on chip pdaf is less than ideal. Prior to the quad core processors, the contrast detect functioned inadequately in low light; but that was par for the course in all cameras without an EDM built in or with flash attached.
What olympus could do is a retro software update to include a focal range lock and a focus-auto-bracketing functionality for the FT and the first editions of the mFT bodies.
In the first instance you would include hyperfocal as one setting with a display of what that is in meters for the lens settings. Then you have arbitary or user definable ranges down to minimum resolving distance for the lens. One setting further to this would be a toggle to a shorter range, another to take at midpoint if no target is found upon full release of the button. Yet another variation would be to lock a point on prefocus half depression, then to hunt only so many meters -cm-mm around this calptured point.
Further to all that we have then the possibility for functionality to both focus auto bracket x amount of frames to y range of the varied focal points, and to execute depth of field auto bracketing.
All the above could be retro programmed in a software update to nearly all four thirds format cameras!
We then open up much enhanced use in sports and nature photography for the entire range of lenses; and in both ontrast detect and pdaf. We also improve possibilities for better results in continuous tracking mode too.
Finally focus bracketing and dof bracketing are both especially useful in macro photography and landscape; on the one side you fire off several shots and find a best frame while on the other you automate a series of shots for merging in post processing.