Problem
Time and work flow is the main problem...
...if the day was rainy all the images that included sky are processed to remove the gray sky and are replaced with blue sky. Many variables come into play with each image including skylines, trees, power lines, etc. so it's important to have an efficient reliable work flow with post processing tools that can get the job do consistently and quickly.
Solution
Different methods were tested and Fluid Mask provided the most consistent and effective workflow....Using Fluid Mask a couple quick clicks on the sky, one click on "Auto-Fill Image, a quick brush on the trees and along the roof tops with the "Blue" Complex Brush, and then a click on "Cut-Out".... bud-a-bing, the image is cut out...