This would be more useful if it could save the Powercfg options at the start of a run, keep it from sleeping during the run, and put things back at the end. If someone is used to their system sleeping after 30 mins, and then for it to never sleep again, that's not doing them any favours. BUT, if you told them, "I have the maintenance set to run Monday evenings and, once started, the PC will stay awake until it's done", that would be much better.
So, to anyone looking to do this, I'd go for the Export option first, change your settings and then a final Import. I mention this because I usually change the powercfg options in D7 especially to make sure that laptops hibernate on battery when the lids close. More than one customer has suffocated their laptop in their carry bag by it /just/ sleeping when closed on battery. And, if anyone has tips on how I can set that from a command line (and not need to use the UI), I'd be glad to hear it.