I have tried the latest dev version including the local contrast tool and I think it is a great tool!
I noticed that it is a perfect addition to the shadow/highlights tool. Example given:
Raising shadows with the latter somewhat flattens the affected area. With the local contrast tool I can now bring back of the some so called “pop” in those areas.
Playing around with it also lead me to an idea. Would it be possible to add an option that allows to make the local contrast tool work only on the areas affected by the shadows highlights tool?
This way we could bring back local contrast in those areas without affecting the other areas. this could be done by a check or something like that.