Agreed, I worry less about the DPS they potentially do and more about the annoyance and CC kit. Hate games where I see multiple rogues generally means sapped over and over, into multiple stuns and silences.
DKs grips, stuns, silences, undispellable snares
Spreist, stuns, fears, silences, mind controls.
Boomkins for their rootbeams, cyclones, stuns.
Honestly if you want to ruin a healers day don’t stack hunters and other pure burst dps classes; stack classes with chain CCs. I get more aggravated not being able to cast or control my character than being bursted.