I found one nagging problem to an otherwise perfect setup.
On the System Preferences -> Energy Saver pane, I get options for both Battery and Power Adapter settings. I set the display sleep on both to 10 minutes, and a few custom settings. Now, the Power Adapter settings stick. But when I close the System Preferences and open it back up, the Battery settings always reverts back to display sleep of Never.
I've been having problems with my display not sleeping sometimes, and when it does sleep, I'd try to wake it and it would go back to sleep right away. It's driving me nuts!
I think the problem may lie in the fact that I have the system profile on my NUC 5i5RHY to Macbook Air 6,2, thus the option for Battery settings. But of course there is no battery, and somehow that seems to be confusing El Capitan in terms of putting the display to sleep and subsequent wakings.
Can I simply change the system profile to an iMac in the config.plist file, so there will be no battery options to confuse it? Or would I have to get a new set of SSDT files among other things?