El Capitan - Bluetooth Not Available

I've been looking through the forums and I'm seeing several references to folks running El Capitan getting the bluetooth icon with a lightning bolt through it, and a drop-down menu that just states "Bluetooth: Not Available". I have a MacBook Pro 15" Retina (Mid-2015).

My additional symptoms are:

1. There is NO Bluetooth Preference Pane. It's gone.
2. There are various errors in /var/log/system.log:
   • Oct 6 09:00:57 ohcpisvp kernel[0]: Sandbox: AssetCacheLocato(1222) deny(1) file-read-data /Applications/Utilities/Bluetooth File Exchange.app/Contents/MacOS/Bluetooth File Exchange/..namedfork/rsrc
   • Oct 6 09:00:57 ohcpisvp kernel[0]: Sandbox: AssetCacheLocato(1222) deny(1) file-read-data /Applications/Utilities/Bluetooth File Exchange.app
   • Oct 6 09:00:57 ohcpisvp kernel[0]: **** [IOBluetoothFamily][SearchForTransportEventTimeOutHandler] -- Missing Bluetooth Controller Transport!
3. Running System Report shows "No Information found" under Bluetooth

This started with an upgrade from Yosemite to El Capitan (retail App Store). Bluetooth operated fine previously.

Disk Utility returns clean.

There is no longer a "Fix Permissions", as El Capitan instantiated the "System Integrity Protection" capability, removing fix permissions (and permanently fixing permissions on all system files).

I have tried the two solutions that were posted elsewhere:

1. Reset SMC (Shutdown, press CNTL-Option-SHIFT-Power, let all of them go simultaneously, then power up)
2. Delete /Library/Preferences/com.apple.Bluetooth.plist

The SMC reset, initially, seemed to return Bluetooth functionality, but putting the system to sleep and re-awakening it caused it to disappear again, since them it's been offline.

Looking to see how many other folks are experiencing this issue, so we can get some attention on it (especially since it seems to have been a common occurrence during the Betas), and to see if anyone has a sticky solution? Resetting the SMC every time I boot seems a bit ridiculous.

-Rob