Hey, super minor but this would indeed save time for people. I selected a color scheme in Emperor which made the most sense for my data, but the NA values also show up in the same color schemes. I was manually changing my "NA"s to white because by default they are colored and it just doesn't look right or make sense. Seems like dynamic checks to see if there are obvious things like "NA" or values that are inconsistent or not numerical (and those get colored something different like white or grey) would be helpful and save people manual labor. 
