Hmm those kexts activated my on-board bluetooth, but I was unable to connect to my devices that way.
Interestingly enough, I found that if I turn off the power supply's switch in the back after shutting down, I would be able to boot up with having all my bluetooth devices recognized.
Also, it makes sense that the situation could be more problematic with builds which feature integrated bluetooth / wifi - as I did not experience any connectivity issues when experimenting with another build w/ next-gen motherboard (z97 UD7 TH), which has no on-board bluetooth / wifi.