No of course you don't have to use the extra kexts for Bluetooth. I used them for my problem with the jerking mouse. (It works a bit better, but does not solve the problem completely).
Remember, if you don't want to use the kexts, you have to disable them in config.plist:
Kernel --> Add --> <number> --> Enabled: NO
But it should in itself also work well with the kexts.