There is hope yet
I installed [ROM][4.3]Unofficial Beanstalk 4.3.1001 (10/03/2013) again after reading that Alsamixer application from Play Store can be used to get the sound back. And im glad to report that it is true.
Right now I'm using this ROM daily for like 4 days and all my use cases are covered (apart from not working SD card reader)
- Bluetooth phone calls in my car works OK with dialling, receiving via car's onboard radio
- I can watch movies using headphones (but it took me some rebooting and restarting Alsamixer, the sound via heaphones did not work at first, I don't know what enabled it)
- normal calls, system sounds via phone speaker and microphone are OK also
One thing you must remember: Alsamixer application will enable sound for you, but it will hang just after start. You have to kill it using "Applications" in the system setting. If you forget it, the phone will NOT deep sleep! The sound will still be OK after you kill Alsamixer.