Hi CaseySJ
Just wanted to let you know that my 0xFF to 255 edit made no difference. Besides, I've found out that my fenvi wouldnt connect to any bluetooth devices on a cold boot (or so I think), but after a reboot all was well again.
I've compared my IOReg dumps from both (i.e., working and 'seemingly working' but unresponsive) bluetooth states, but couldn't find any noticeable differences. In retrospect, I think I may have looked at the wrong sub-entry when I blamed HS11 for presenting itself as a 'zero'/external usb2 port.
I still don't understand why or what, but decided to migrate to the beta Intel bluetooth drivers. Though your supplied FD R6 .aml file didn't work for me, simply swapping HS11 for HS14 (and 0x0E for 0x0F if I recall correctly) did the trick.
Never used handoff and smart watches so far so, so far so good for me. Love your continued support and assistance here, much appreciated!