Yep, this is true. As the cm12.1 base hasn't changed under this new version, the things that didn't work on 3.2.0.12 won't work on 3.2.1.19 either.
I can confirm the rubbish sound on bluetooth calls.
Although I only have used it with my bluetooth radio transmitter in my car.) It works, buts for calls it sounds hmm.. funny.
Interestingly the same transmitter used for playing music from Nexus 5 via bluetooth sounds very good.

And the marriage of AD and the latest Sailfish OS is a perk.