apply swatch to monotone/greyscale with transparency (psd,png,tiff,ai).
Apply swatch to linked object only currently works with flattened greyscale psd, jpg or tiff. Often I need to change greyscale images WITH TRANSPARENCY (vector and raster) to match colors from other photos in indd. Currently I have to open psd and created several hue adjustment layers, or layers in ai with the color changes, and going back to each as I modify color in the pallette.
Joachim Tillessen commented
For me coloring vector files is even more common place. I would love to have color control for all monotone logos and icons in my CC Library in my InDesign document.