agree, dark details need to improve...

It was challenging to expose correctly due to high dynamic conditions.   Many shots are under exposed to prevent highlight clipping.  Exposures were balanced in LR afterwards. In addition, there was very little time(5-10mins) in each location for setup tripod and filters.  Most of the time, I was running around like crazy to get a decent composition. So, most of photos are handheld.  I could have bracketed exposures and do HDR later, however, I sticked with single exposure, due to my personal prefernce (or laziness:)