It would be nice to see improvements, as the sun technically is not a good choice at all, its a spot light essential, and is very noticeable as such when you use an object with its specular highlighting. This will even influence how the clouds receive direct light, especially with TGs issue with sun burning in clouds (creating giant hard glow circle that the first lighting setting can't spread out enough). Will soft shadows really somehow effect highlights?
To me it's very obviously like shining a flashlight with cascading rays. This will most certainly effect the Y+/Y- look like it does for any overcast scene looking at the sun area.