Lightroom--I would love to see relative presets as opposed to only absolute presets. For example, I may want to add +10 of yellow in Temperature to what ever setting exists and not a static number.
This would be great for white balancing where pleasing color is preferable over accurate color. I may want to white balance a set of pictures and add +10 of yellow to warm things up.
I find a lot of presets aren’t useful in my workflow, but a relative color temp/tint would be.