[ckaotik]

I have something along these lines in a custom addon ... here are the parts that you would probably need. However, I have not tested this code (as standalone). It assumes that any CC effect is on a diminishing return and only shows those.

P.S. Please tell me if this worked for you

Requirements:

1) a place to put the code: If you don't happen to have a dummy addon to stuff code into already, you can create one here: http://addon.bool.no
2) DRData-1.0 library, which can be found here: http://www.wowace.com/addons/drdata-1-0/
3) put this in your lua file (or the lua input box on addon.bool.no)

local DRData = LibStub('DRData-1.0')
local hideDRType = {
    ["ctrlroot"] = true,
    ["shortroot"] = true,
    ["disarm"] = true,
    ["taunt"] = true,
    ["knockback"] = true,
}
 
local isDisabled = nil
local _FRAMES = {}
 
local function UpdateOverlay(self)
    if not self.Overlay then return end
    local display, drType = nil, nil
    for i = 1, 40 do
        local _, _, icon, count, dispelType, _, expires, caster, _, _, spellID, canApplyAura, isBoss = UnitDebuff(self.displayedUnit or self.unit, i)
        local drType = DRData:GetSpellCategory(spellID)
        if drType and not hideDRType[drType] then
            display = true
            break
        end
    end
 
    if display then
        self.Overlay.icon:SetTexture(icon)
        self.Overlay.icon:SetDesaturated( caster == "player" )
        self.Overlay.count:SetText(count == 1 and '' or count)
        local now = GetTime()
        self.Overlay.cooldown:SetCooldown(now, expires - now)
 
        self.Overlay:Show()
    else
        self.Overlay:Hide()
    end
end
 
local isHooked = nil
local Disable = function(self)
    local overlay = self.Overlay
    if overlay then
        for k, frame in ipairs(_FRAMES) do
            if frame == self then
                tremove(_FRAMES, k)
                overlay:Hide()
                break
            end
        end
 
        if #_FRAMES == 0 and isHooked then
            isDisabled = true
        end
    end
end
 
local Enable = function(self)
    local overlay = self.Overlay
    if overlay then
        tinsert(_FRAMES, self)
        isDisabled = nil
        if not isHooked then
            hooksecurefunc("CompactUnitFrame_UpdateDebuffs", UpdateOverlay)
            isHooked = true
        end
    end
end
 
hooksecurefunc("CompactUnitFrame_UpdateVisible", function(frame)
    if not frame.Overlay and frame.unit and not frame.unit:find('pet') then
        local overlay = CreateFrame("Button", "$parentCUFOverlay", frame, "CompactAuraTemplate")
              overlay:SetPoint('CENTER', 0, 0)
              overlay:SetSize(20, 20)
              overlay:EnableMouse(false)
              overlay:EnableMouseWheel(false)
              overlay:Hide()
        frame.Overlay = overlay
        Enable(frame)
    end
end)

4) put this in your toc file (or click 'Show advanced (TOC) options' and add this line to the toc box):

## Dependencies: DRData-1.0