So when using ambiance and HDR settings, we lose the possibility to increase gamma on the Windlight settings, which always worked as a mean to increase exposure and get a proper and bright sunny day. Since we got PBR, using those settings makes shadows very dull, ambient lighting it's excesive even setting them just at 1.0 and the sun barely changes increasing it's color value above just 40.
We definitely need some way to make the light of the sun stronger while keeping the darkness of the shadows because right now we have to choose between one of the two. So everything it's either too bright and lacking shadows or too dark and lacking lighting from the sun. This request goes tied to a better management of the auto exposure settings as well.