I wouldn't call it a lack of thought process as I would laziness as I'm just a casual who does heroics.
Having to micromanage CS to the point that I'll have to pre-plan if I should use it before I have to swap to a totem on Nazgrim, or switch to adds/totems/demolisher on Galakras, or pay any attention on protector's HP to see when they'll switch into desperate measures.. nah I'm good.
Phase switches are more simpler to pay attention to, but the ones that don't have a timer.. it will happen once in a great while. I'm sure the DPS lost is negligible but popping CS when you're ready to unload.. dang so annoying.
For the record, I'm not disagreeing with the fact that CS has made Fury more fun and engaging and does exactly the opposite of make me upset.