I think the reality is that you have to give up the notion of using CS as a function of legacy Windows. There are many areas where the two are not compatible and power management is one of them. If you cannot/do not want to move to the new ecosystem, you can disable CS and use SP3 as a regular Windows device. You will then be able to turn off power to the monitor without having the machine go to sleep. But you can't do this and keep CS at the same time. You'll just have to choose which is more important to you.
I HAVE disabled CS and it still doesn't work the way I want it to. I want to be able to hit a button or menu option to turn off the screen WITHOUT putting the SP3 to sleep instead of having it time out after a while if idle.