Note: Diminish currently does not seem to work on beta due some API changes, waiting for TWW release and then releasing a fix. :)
I updated this addon but by no means I am a good programmer. If you want to contribute please do so as a pull request on my branch at github.
If you encounter any issues make a comment / create a issue on curse but no promises I can fix them. I will probably move it to a proper github page so you can report issues there.
Link to the Original Project: https://www.curseforge.com/wow/addons/diminish
All credits go out to wardz.
About
Diminish attaches icons to unit frames or nameplates, displaying time left until a crowd control diminishing returns category expires for that unit. As well as how far the category is diminished. (Green border = 50% duration, yellow = 25%, red = 0%)
DR icons for each unit frame is separately configurable. Certain unit frames are default disabled for tracking or only enabled for certain zones.
Also optionally tracks DRs for NPCs. Normal mobs shows stun/taunt DR while special mobs shows all categories.
Configuration
Type /diminish to open the options panel. You may also skin the icons using Masque.
You can manually set static icons used for a DR category by right clicking one of the checkboxes under "Enabled Categories" section.